[ { "key": "YTNA2BK7", "version": 119, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/YTNA2BK7", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/YTNA2BK7", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/273783/items/8I3KS6HG", "type": "application/json" } }, "meta": { "createdByUser": { "id": 394125, "username": "steve.culman", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/steve.culman", "type": "text/html" } } }, "numChildren": 0 }, "data": { "key": "YTNA2BK7", "version": 119, "parentItem": "8I3KS6HG", "itemType": "attachment", "linkMode": "imported_file", "title": "Bast et al. - 2012 - Evaluation of the Pre-sidedress Soil Nitrate Test .pdf", "accessDate": "", "url": "", "note": "", "contentType": "application/pdf", "charset": "", "filename": "Bast et al. - 2012 - Evaluation of the Pre-sidedress Soil Nitrate Test .pdf", "md5": "cb4a753171ca5d7ce78305c6404f97c0", "mtime": 1645030859000, "tags": [], "relations": {}, "dateAdded": "2022-02-16T17:00:49Z", "dateModified": "2022-02-16T17:00:59Z" } }, { "key": "8I3KS6HG", "version": 118, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/8I3KS6HG", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/8I3KS6HG", "type": "text/html" } }, "meta": { "createdByUser": { "id": 394125, "username": "steve.culman", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/steve.culman", "type": "text/html" } } }, "creatorSummary": "Bast et al.", "parsedDate": "2012", "numChildren": 1 }, "data": { "key": "8I3KS6HG", "version": 118, "itemType": "journalArticle", "title": "Evaluation of the Pre-sidedress Soil Nitrate Test in Ohio", "creators": [ { "creatorType": "author", "firstName": "Laura E.", "lastName": "Bast" }, { "creatorType": "author", "firstName": "Robert W.", "lastName": "Mullen" }, { "creatorType": "author", "firstName": "Donald J.", "lastName": "Eckert" }, { "creatorType": "author", "firstName": "Peter R.", "lastName": "Thomison" } ], "abstractNote": "Growers need to identify optimum N application rates for corn grain production to maximize economic return and minimize N losses. The pre-sidedress soil nitrate test (PSNT) is used to improve N management decisions in several states, but critical values were established years ago with older corn hybrids. Our objectives were to determine the PSNT critical value for current Ohio corn production using three model types and identify the relationship between agronomic optimum N rate (AONR) and soil nitrate-N (NO3-N). From 2004 to 2008, 34 field experiments were established across Ohio. At each location, soil samples were collected at the V4 to V6 corn growth stage. Relative grain yield was correlated with soil NO3-N levels. Three types of models were evaluated to determine the PSNT critical value. The PSNT pre-sidedress soil nitrate test critical values were 17, 22, and 31 µg NO3-N/g soil for the linear-plateau, quadratic-plateau, and quadratic-plus-plateau model, respectively. The critical value of 31 µg NO3-N/g soil reduces the chance of yield loss due to N deficiency, but increases the chance of N over application; however, the lower critical value of 17 µg NO3-N/g soil increases chance of yield loss due to N deficiency, but decreases the chance of N over application. AONR was inversely related to soil NO3-N concentration; however, the rate varied at soil N levels <25 µg NO3-N/g soil.", "publicationTitle": "Crop Management", "publisher": "", "place": "", "date": "2012", "volume": "11", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "1-8", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Crop Management", "DOI": "10.1094/CM-2012-0409-01-RS", "citationKey": "", "url": "http://doi.wiley.com/10.1094/CM-2012-0409-01-RS", "accessDate": "2022-02-16T17:00:59Z", "PMID": "", "PMCID": "", "ISSN": "15437833", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "DOI.org (Crossref)", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [ "2KX9A6G4" ], "relations": {}, "dateAdded": "2022-02-16T17:00:59Z", "dateModified": "2022-02-16T17:00:59Z" } }, { "key": "H9VJBUQB", "version": 116, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/H9VJBUQB", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/H9VJBUQB", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/273783/items/PGNR8LCC", "type": "application/json" } }, "meta": { "createdByUser": { "id": 394125, "username": "steve.culman", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/steve.culman", "type": "text/html" } } }, "numChildren": 0 }, "data": { "key": "H9VJBUQB", "version": 116, "parentItem": "PGNR8LCC", "itemType": "note", "note": "

doi: 10.1080/00103629809370048

", "tags": [], "relations": {}, "dateAdded": "2019-11-23T12:17:54Z", "dateModified": "2019-11-23T12:17:54Z" } }, { "key": "PGNR8LCC", "version": 116, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/PGNR8LCC", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/PGNR8LCC", "type": "text/html" } }, "meta": { "createdByUser": { "id": 394125, "username": "steve.culman", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/steve.culman", "type": "text/html" } } }, "creatorSummary": "Jones", "parsedDate": "1998-06-01", "numChildren": 1 }, "data": { "key": "PGNR8LCC", "version": 116, "itemType": "journalArticle", "title": "Soil test methods: Past, present, and future use of soil extractants", "creators": [ { "creatorType": "author", "firstName": "J.Benton", "lastName": "Jones" } ], "abstractNote": "", "publicationTitle": "Communications in Soil Science and Plant Analysis", "publisher": "", "place": "", "date": "June 1, 1998", "volume": "29", "issue": "11-14", "section": "", "partNumber": "", "partTitle": "", "pages": "1543-1552", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Communications in Soil Science and Plant Analysis", "DOI": "10.1080/00103629809370048", "citationKey": "", "url": "https://doi.org/10.1080/00103629809370048", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0010-3624", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2019-11-23T12:17:54Z", "dateModified": "2019-11-23T12:17:54Z" } }, { "key": "STMEPP7B", "version": 108, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/STMEPP7B", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/STMEPP7B", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1988889, "username": "soils.lab", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/soils.lab", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Eckert and Watson", "parsedDate": "1996-03-01", "numChildren": 2 }, "data": { "key": "STMEPP7B", "version": 108, "itemType": "journalArticle", "title": "Integrating the mehlich‐3 extractant into existing soil test interpretation schemes 1", "creators": [ { "creatorType": "author", "firstName": "D. J.", "lastName": "Eckert" }, { "creatorType": "author", "firstName": "M. E.", "lastName": "Watson" } ], "abstractNote": "", "publicationTitle": "Communications in Soil Science and Plant Analysis", "publisher": "", "place": "", "date": "March 1, 1996", "volume": "27", "issue": "5-8", "section": "", "partNumber": "", "partTitle": "", "pages": "1237-1249", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Communications in Soil Science and Plant Analysis", "DOI": "10.1080/00103629609369629", "citationKey": "", "url": "http://dx.doi.org/10.1080/00103629609369629", "accessDate": "2014-07-07", "PMID": "", "PMCID": "", "ISSN": "0010-3624", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "00046", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2014-07-15T16:49:25Z", "dateModified": "2019-05-22T18:49:06Z" } }, { "key": "PXZVJXUE", "version": 107, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/PXZVJXUE", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/PXZVJXUE", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1988889, "username": "soils.lab", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/soils.lab", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Gartley et al.", "parsedDate": "2002-04-10", "numChildren": 2 }, "data": { "key": "PXZVJXUE", "version": 107, "itemType": "journalArticle", "title": "Comparison of soil test extractants used in mid-Atlantic United States", "creators": [ { "creatorType": "author", "firstName": "K. L.", "lastName": "Gartley" }, { "creatorType": "author", "firstName": "J. T.", "lastName": "Sims" }, { "creatorType": "author", "firstName": "C. T.", "lastName": "Olsen" }, { "creatorType": "author", "firstName": "P.", "lastName": "Chu" } ], "abstractNote": "", "publicationTitle": "Communications in Soil Science and Plant Analysis", "publisher": "", "place": "", "date": "April 10, 2002", "volume": "33", "issue": "5-6", "section": "", "partNumber": "", "partTitle": "", "pages": "873-895", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Communications in Soil Science and Plant Analysis", "DOI": "10.1081/CSS-120003072", "citationKey": "", "url": "http://www.tandfonline.com/doi/abs/10.1081/CSS-120003072", "accessDate": "2014-07-07", "PMID": "", "PMCID": "", "ISSN": "0010-3624", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "00032", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2014-07-15T16:49:25Z", "dateModified": "2019-05-22T18:48:58Z" } }, { "key": "IKWQNW4C", "version": 106, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/IKWQNW4C", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/IKWQNW4C", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1988889, "username": "soils.lab", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/soils.lab", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Alva", "parsedDate": "1993", "numChildren": 2 }, "data": { "key": "IKWQNW4C", "version": 106, "itemType": "journalArticle", "title": "Comparison of mehlich 3, mehlich 1, ammonium bicarbonate‐DTPA, 1.0M ammonium acetate, and 0.2M ammonium chloride for extraction of calcium, magnesium, phosphorus, and potassium for a wide range of soils 1", "creators": [ { "creatorType": "author", "firstName": "A. K.", "lastName": "Alva" } ], "abstractNote": "Abstract Extractants employed for routine soil analysis vary from one laboratory to another. Lack of a universal soil extractant is a serious limitation for interpretation of analytical results from various laboratories on nutritional status of a given soil. This limitation can be overcome by developing functional relationships for concentrations of a given nutrient extractable by various extradants. In this study, extractability of Ca, Mg, P, and K in a wide range of soils (0–15 cm) from citrus groves in Florida representing 21 soil series, with varying cultural operations, were compared using Mehlich 3 (M3), Mehlich 1 (M1), ammonium acetate (NH4AOc), pH = 7.0 (AA), 0.2M ammonium chloride (NH4Cl), and ammonium bicarbonate‐DTPA (AB‐DTPA) extractants. Soil pH (0.01M CaCl2) varied from 3.57 to 7.28. The concentrations of Ca or Mg extractable by M3, M1, AA, and NH4Cl were strongly correlated with soil pH (r2 = 0.381–0.482). Weak but significant correlations were also found between AB‐DTPA extractable Ca or Mg and soil pH (r2 = 0.235–0.278). Soil pH relationships with extractable K were rather weak (r2 = < 0.131) for M1 and NH4Cl but non‐significant for M3, AB‐DTPA, and AA. Concentrations of Ca, Mg, and K extractable by M3 were significantly correlated with those by either M1, AA, or NH4Cl extractants. Mehlich 3‐P was significantly correlated with P extractable by M1 extractant only. Mehlich 3 versus AB‐DTPA relationship was strong for K (r2 = 0.964), weaker for Mg and P (r2 = 0.180–0.319), and non‐significant for Ca. With the increasing emphasis on possible use of M3 as an universal soil extractant, data from this study support the hypothesis that M3 can be adapted as a suitable extractant for routine soil analysis.", "publicationTitle": "Communications in Soil Science and Plant Analysis", "publisher": "", "place": "", "date": "1993", "volume": "24", "issue": "7-8", "section": "", "partNumber": "", "partTitle": "", "pages": "603-612", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1080/00103629309368826", "citationKey": "", "url": "http://dx.doi.org/10.1080/00103629309368826", "accessDate": "2014-07-08T20:08:26Z", "PMID": "", "PMCID": "", "ISSN": "0010-3624", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Taylor and Francis+NEJM", "callNumber": "", "rights": "", "extra": "00033", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2014-07-15T16:49:25Z", "dateModified": "2019-05-22T18:48:48Z" } }, { "key": "AB9K23E9", "version": 105, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/AB9K23E9", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/AB9K23E9", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1988889, "username": "soils.lab", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/soils.lab", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Beegle and Oravec", "parsedDate": "1990-08-01", "numChildren": 2 }, "data": { "key": "AB9K23E9", "version": 105, "itemType": "journalArticle", "title": "Comparison of field calibrations for mehlich 3 P and K with Bray‐Kurtz P1 and ammonium acetate K for corn", "creators": [ { "creatorType": "author", "firstName": "D. B.", "lastName": "Beegle" }, { "creatorType": "author", "firstName": "T. C.", "lastName": "Oravec" } ], "abstractNote": "", "publicationTitle": "Communications in Soil Science and Plant Analysis", "publisher": "", "place": "", "date": "August 1, 1990", "volume": "21", "issue": "13-16", "section": "", "partNumber": "", "partTitle": "", "pages": "1025-1036", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Communications in Soil Science and Plant Analysis", "DOI": "10.1080/00103629009368288", "citationKey": "", "url": "http://www.tandfonline.com/doi/abs/10.1080/00103629009368288", "accessDate": "2014-07-07", "PMID": "", "PMCID": "", "ISSN": "0010-3624", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "00052", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2014-07-15T16:49:25Z", "dateModified": "2019-05-22T18:48:38Z" } }, { "key": "SUNVIKP2", "version": 104, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/SUNVIKP2", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/SUNVIKP2", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1988889, "username": "soils.lab", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/soils.lab", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Wang et al.", "parsedDate": "2004", "numChildren": 2 }, "data": { "key": "SUNVIKP2", "version": 104, "itemType": "journalArticle", "title": "Comparison of Soil-Test Extractants for Phosphorus, Potassium, Calcium, Magnesium, Sodium, Zinc, Copper, Manganese, and Iron in Louisiana Soils", "creators": [ { "creatorType": "author", "firstName": "Jim Jian", "lastName": "Wang" }, { "creatorType": "author", "firstName": "Dustin L.", "lastName": "Harrell" }, { "creatorType": "author", "firstName": "Rodney E.", "lastName": "Henderson" }, { "creatorType": "author", "firstName": "Paul F.", "lastName": "Bell" } ], "abstractNote": "Abstract Soils of different geographic regions affect efficiencies of individual soil-test extractants. Recent effort on nutrient-management programs across the United States has promoted establishment of conversion equations between different soil-test extractants for evaluating nutrients in similar soils. This study was carried out to compare soil-extractable phosphorus (P) by strong Bray (Bray 2), potassium (K), calcium (Ca), magnesium (Mg), sodium (Na) by 1 M ammonium acetate (pH 7.0), and zinc (Zn), copper (Cu), manganese (Mn), iron (Fe) by DTPA-TEA at pH 7.3 with those extracted by Mehlich 3 on 317 soil samples collected from all parishes of Louisiana. Mehlich 3-extractable P correlated (R 2 = 0.709, P > 0.01) with that extracted by Bray 2 but was, on average, about half of that by Bray 2. Soils with pH > 6.5 or with finer textures tended to yield larger differences between the two extractants for P. Mehlich 3 extractable cations were highly correlated with those of ammonium acetate (R 2 ≥ 0.923, P > 0.01). Extractable Mg was close to 1:1 relation between the two procedures with slightly higher K and Ca, but lower Na by Mehlich 3. No notable effect of soil pH and texture was observed on K, Ca, Mg, and Na comparisons. Extractable Zn and Cu by Mehlich 3 generally correlated with those by DTPA (R 2 ≥ 0.899, P > 0.01) but the correlations on Mn and Fe were not as high (R 2 ≤ 0.420). Soil texture had no effect on efficiencies of micronutrient extractions with Mehlich 3 and DTPA. Soils with pH > 6.5 affected Fe and Mn ratios of Mehlich 3 extraction over DTPA but not on those of Zn and Cu. These results suggest that conversion equations could be developed for P, K, Ca, Mg, Na, Zn, and Cu between Mehlich 3, Bray 2, ammonium acetate, and DTPA for Louisiana soils. Soil pH and textural factors may need to be considered for soil P conversions between Mehlich 3 and Bray 2.", "publicationTitle": "Communications in Soil Science and Plant Analysis", "publisher": "", "place": "", "date": "2004", "volume": "35", "issue": "1-2", "section": "", "partNumber": "", "partTitle": "", "pages": "145-160", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1081/CSS-120027640", "citationKey": "", "url": "http://dx.doi.org/10.1081/CSS-120027640", "accessDate": "2014-07-08T20:04:38Z", "PMID": "", "PMCID": "", "ISSN": "0010-3624", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Taylor and Francis+NEJM", "callNumber": "", "rights": "", "extra": "00041", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2014-07-15T16:49:25Z", "dateModified": "2019-05-22T18:48:21Z" } }, { "key": "C4WDA5WW", "version": 103, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/C4WDA5WW", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/C4WDA5WW", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1988889, "username": "soils.lab", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/soils.lab", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Hanlon and Johnson", "parsedDate": "1984", "numChildren": 2 }, "data": { "key": "C4WDA5WW", "version": 103, "itemType": "journalArticle", "title": "Bray/Kurtz, Mehlich III, AB/D and ammonium acetate extractions of P, K and MG in four oklahoma soils", "creators": [ { "creatorType": "author", "firstName": "E. A.", "lastName": "Hanlon" }, { "creatorType": "author", "firstName": "G. V.", "lastName": "Johnson" } ], "abstractNote": "Abstract Multi‐element soil extraction solutions offer increased convenience in soil testing laboratory operations. The recently developed Mehlich III and ammonium bicarbonate‐DTPA multi‐element extraction solutions were each compared with the more conventional Bray/Kurtz extractant for P determination and with 1N ammonium acetate for K and Mg determinations. The latter two solutions are single and tri‐element extractants in current use by the Oklahoma State University Soil Testing Laboratory. The Bray/Kurtz extractant was also compared with the 1N ammonium acetate for K and Mg determination. A total of 310 soil samples from four soil types, which included five long‐term soil fertility experiments, were used for these comparisons. All sites have been in continous wheat production and received various N‐P‐K fertilizer treatments for at least: five years prior to soil sampling. AIT soil samples were extracted in triplicate for each extractant. Results showed that extraction of elements, by all solutions were highly correlated to the Bray/Kurtz and 1N ammonium acetate:extractants for Oklahoma soils.", "publicationTitle": "Communications in Soil Science and Plant Analysis", "publisher": "", "place": "", "date": "1984", "volume": "15", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "277-294", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1080/00103628409367475", "citationKey": "", "url": "http://www.tandfonline.com/doi/abs/10.1080/00103628409367475", "accessDate": "2014-07-08T19:04:19Z", "PMID": "", "PMCID": "", "ISSN": "0010-3624", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Taylor and Francis+NEJM", "callNumber": "", "rights": "", "extra": "00063", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2014-07-15T16:49:25Z", "dateModified": "2019-05-22T18:48:11Z" } }, { "key": "EP6PH4A3", "version": 102, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/EP6PH4A3", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/EP6PH4A3", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1988889, "username": "soils.lab", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/soils.lab", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Mallarino and Blackmer", "parsedDate": "1992", "numChildren": 2 }, "data": { "key": "EP6PH4A3", "version": 102, "itemType": "journalArticle", "title": "Comparison of Methods for Determining Critical Concentrations of Soil Test Phosphorus for Corn", "creators": [ { "creatorType": "author", "firstName": "A.P.", "lastName": "Mallarino" }, { "creatorType": "author", "firstName": "A.M.", "lastName": "Blackmer" } ], "abstractNote": " Critical concentrations of soil-test P (STP) are used to identify soils where response to P fertilization should be expected. There is, however, little agreement concerning the methods that should be used to identify critical STP concentrations. This study compares the efficacy of critical STP concentrations generated by using various methods. Twenty-five P fertilization trials with corn (Zea mays L.) were established in Iowa. Available soil P at each site was estimated by the Bray-P1, Mehlich-3, and Olsen extractants. Corn yield response was expressed in both absolute and relative terms and then related to STP values by using various statistical models (Cate-Nelson split, linearplateau and quadratic-plateau segmented polynomials, the quadratic polynomial, an exponential Mitscherlich-type equation, and a multivariate polynomial). The use of various combinations of the extractants, expressions of yield response, and models resulted in a wide variety of critical STP concentrations. Comparisons of the ability of each critical concentration to generate economic returns when used to guide fertilization across the 25 sites showed that selection of the model was much more important than selection of the extractant or the expression of yield response. The best model was the Cate-Nelson, which identified critical concentrations of 13 rag kg-1 for the Bray-P1, 12 mg kg-1 for the Mehlich-3, and 5 mg kg-1 for the Olsen extractants. Overall, the results of this study demonstrate that selection of the most appropriate critical STP concentration can be a major factor affecting the profitability of fertilization in areas having an abundance of soils testing high in P. Journal Paper no. J-14617 of the Iowa Agric. and Home Econ. Exp. Stn. Project 2995. This work was supported in part by the Northwest Area Foundation and by the Integrated Farm Management Demonstration Program of The Agricultural Energy Management Fund, State of Iowa, through the Iowa Dep. of Agric. and Land Stewardship.", "publicationTitle": "Agronomy Journal", "publisher": "", "place": "", "date": "1992", "volume": "84", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "850-856", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.2134/agronj1992.00021962008400050017x", "citationKey": "", "url": "https://dl.sciencesocieties.org/publications/aj/abstracts/84/5/850", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "00089", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2014-07-15T16:49:25Z", "dateModified": "2019-05-22T18:48:02Z" } }, { "key": "6V2Z2BQT", "version": 101, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/6V2Z2BQT", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/6V2Z2BQT", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1988889, "username": "soils.lab", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/soils.lab", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Atia and Mallarino", "parsedDate": "2002", "numChildren": 1 }, "data": { "key": "6V2Z2BQT", "version": 101, "itemType": "journalArticle", "title": "Agronomic and Environmental Soil Phosphorus Testing in Soils Receiving Liquid Swine Manure", "creators": [ { "creatorType": "author", "firstName": "A. M.", "lastName": "Atia" }, { "creatorType": "author", "firstName": "A. P.", "lastName": "Mallarino" } ], "abstractNote": "", "publicationTitle": "Soil Science Society of America Journal", "publisher": "", "place": "", "date": "2002", "volume": "66", "issue": "5", "section": "", "partNumber": "", "partTitle": "", "pages": "1696", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.2136/sssaj2002.1696", "citationKey": "", "url": "https://dl.sciencesocieties.org/publications/sssaj/abstracts/66/5/1696", "accessDate": "2014-07-11T19:22:05Z", "PMID": "", "PMCID": "", "ISSN": "1435-0661", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "CrossRef", "callNumber": "", "rights": "", "extra": "00038", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2014-07-15T16:49:25Z", "dateModified": "2019-05-22T18:47:51Z" } }, { "key": "SRAPI6IU", "version": 100, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/SRAPI6IU", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/SRAPI6IU", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1988889, "username": "soils.lab", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/soils.lab", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Tran et al.", "parsedDate": "1990", "numChildren": 2 }, "data": { "key": "SRAPI6IU", "version": 100, "itemType": "journalArticle", "title": "Evaluation of Mehlich‐III extractant to estimate the available P in Quebec soils", "creators": [ { "creatorType": "author", "firstName": "T. Sen", "lastName": "Tran" }, { "creatorType": "author", "firstName": "M.", "lastName": "Giroux" }, { "creatorType": "author", "firstName": "J.", "lastName": "Guilbeault" }, { "creatorType": "author", "firstName": "P.", "lastName": "Audesse" } ], "abstractNote": "Abstract The Mehlich‐III method used for the determination of available P in 82 Quebec soils was compared to five other chemical methods (Bray‐II, Bray‐I, Mehlich‐II, Mehlich‐I and Olsen) and to two anion exchange resin techniques (F‐ and HCO‐ 3) In general, very good correlations were found between Mehlich‐III, Bray‐II and Bray‐I methods on acid soils (r=0.95∗∗ and 0.98∗∗). The Mehlich‐III‐P content is somewhat the same as that determined by Bray‐I and corresponds approximately to 80% of Bray‐II‐P. The Mehlich—III extractant was found to be more reliable than Bray‐II and Bray‐I on very acid spodosols having high P‐sorption capacity. The Bray methods, with high NH4F concentration, extracted strongly fixed Al‐P in these soils and may overestimate the available P. In some acid soils containing apatite and in calcareous soils, the Bray‐II and Mehlich‐I (double acid) easily dissolved these Ca‐P compounds and gave exaggerated high P values. The Mehlich‐III and the other methods were less vigourous for these compounds and were more accurate in estimating available P in these soils. On moderately calcarous soils, the Bray‐I and Mehlich‐I are partially neutralized by the free carbonates in the soil and become less effective in extracting soil P. The Mehlich‐III reactant is more buffered and less affected by carbonates in these soils. The Mehlich‐III and the Mehlich‐II were highly correlated for all soils having diverse properties (r=0.98∗∗) and the amount of P extracted by Mehlich‐III was 117% of that extracted by Mehlich‐II. The Mehlich‐III method showed good correlation with Olsen and anion exchange resin techniques (r=0.89∗∗ to 0.93∗∗). The Mehlich‐III extracted about three times more P than Olsen and approximately 1.2 times of that desorbed by HCO‐ 3‐resin. The amount of P desorbed by F‐‐resin was higher and corresponded to about 1.25 times that estimated by Mehlich‐III. The Olsen method and the F‐ and HCO‐ 3 ‐resins tended to extract Ca‐P and Fe‐P more easily than Mehlich‐III. However, on some acid spodosols probably containing phosphates covered with oxide coatings, the Olsen extractant and the F‐ and HCO‐ 3‐resins did not attack these compounds and gave relatively low P values as compared to the acid chemical methods. Among the acid chemical methods, the Mehlich‐III was considered the most appropriate and economic procedure to be used for soil P testing in the laboratory for different kinds of soil because of its capacity to extract simultaneously other soil nutrients. The Al content in the Mehlich‐III extract may give an estimate of P‐sorption capacity. Some possibilities concerning the conversion of soil fertility levels established by Bray‐II, Bray‐I and Mehlich‐II to that of Mehlich‐III were proposed for the purpose of P fertilizer recommendations.", "publicationTitle": "Communications in Soil Science and Plant Analysis", "publisher": "", "place": "", "date": "1990", "volume": "21", "issue": "1-2", "section": "", "partNumber": "", "partTitle": "", "pages": "1-28", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1080/00103629009368212", "citationKey": "", "url": "http://dx.doi.org/10.1080/00103629009368212", "accessDate": "2014-07-08T15:36:32Z", "PMID": "", "PMCID": "", "ISSN": "0010-3624", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Taylor and Francis+NEJM", "callNumber": "", "rights": "", "extra": "00093", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2014-07-15T16:49:25Z", "dateModified": "2019-05-22T18:47:38Z" } }, 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"https://api.zotero.org/groups/273783/items/ZEZ37QZ9", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/ZEZ37QZ9", "type": "text/html" } }, "meta": { "createdByUser": { "id": 394125, "username": "steve.culman", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/steve.culman", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Mallarino", "parsedDate": "2003", "numChildren": 1 }, "data": { "key": "ZEZ37QZ9", "version": 96, "itemType": "journalArticle", "title": "Field calibration for corn of the Mehlich-3 soil phosphorus test with colorimetric and inductively coupled plasma emission spectroscopy determination methods", "creators": [ { "creatorType": "author", "firstName": "Antonio P.", "lastName": "Mallarino" } ], "abstractNote": "", 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"itemType": "journalArticle", "title": "Mehlich 3 soil test extractant: A modification of Mehlich 2 extractant", "creators": [], "abstractNote": "The objectives of this study were to modify the Mehlich 2 (M2)\nextractant to include Cu among the extractable nutrients, retain or enhance\nthe wide range of soils for which it is suitable and minimize\nit's corrosive properties. The substitution of nitrate for chloride\nanions and the addition of EDTA accomplished those objectives. The new\nextracting solution, already designated Mehlich 3 (M3) is composed of\n0.2N CH3COOH - 0.25N NH4N03 - 0.015NNH4F - 0.013NHN03 - 0.001M EDTA.\nExtractions from 105 soils using M3, M2, Bray 1 (Bl) and Ammonium\nAcetate (AA) were compared to evaluate the new extractant. The quantity\nof F extracted by M3 exceeded that by M2 20% and that by Bl 4% but the\nresults from all extractions were highly correlated. Extractions of\nboth K and Mg by M3 were 6-8% higher than those by AA and 3-4% higher\nthan those by M2, but, again, there was high correlation among methods.\nAddition of EDTA increased Cu extractions by 170%, Mn by 50% and Zn by\n25%. Cu extractions by M3 correlated with those from the Mehlich-Bowling\nmethod. High correlations between Mn, as well as Zn, extracted by M3 and\nM2 were shown", "publicationTitle": "Communications in Soil Science and Plant Analysis", "publisher": "", "place": "", "date": "", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2018-06-15T18:09:32Z", "dateModified": "2019-05-22T18:43:39Z" } }, { "key": "WM2ATCVQ", "version": 87, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/WM2ATCVQ", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/WM2ATCVQ", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1988889, "username": "soils.lab", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/soils.lab", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Wolf and Baker", "parsedDate": "1985", "numChildren": 2 }, "data": { "key": "WM2ATCVQ", "version": 87, "itemType": "journalArticle", "title": "Comparisons of soil test phosphorus by Olsen, Bray P1, Mehlich I and Mehlich III methods", "creators": [ { "creatorType": "author", "firstName": "Ann M.", "lastName": "Wolf" }, { "creatorType": "author", "firstName": "D. E.", "lastName": "Baker" } ], "abstractNote": "Abstract A study was undertaken to evaluate the agreement among different university laboratories performing the Olsen, Bray P1, and Mehlich I tests for P on a diverse group of noncalcareous agricultural soils and to develop relationships among the Olsen, Bray P1, Mehlich I, and Mehlich III soil tests. For each test, the results from the individual laboratories were highly correlated (r2 ≥ 0.90) and in almost all instances the slopes of the equations describing the relationships among laboratories approached one, The results indicate that the Olsen, Bray P1 and Mehlich I soil tests may be performed with a high degree of precision when standard soil test procedures are followed. Of the three most commonly performed tests in the U.S. (Olsen, Bray P1, and Mehlich I), the Olsen and Mehlich I tests were the most highly correlated (r2 = 0.87) although the Mehlich I test removed approximately one and one half times more P than did the Olsen test. Bray P1 and Olsen and Mehlich I P were less highly correlated (r2 ≤ 0.72) and the relationships between these variables were influenced by the texture of the soils. The quantity of P removed by the Bray P1 test was on the order of two and three times greater than that removed by the Olsen and Mehlich I tests, respectively. The Bray P1 and Mehlich III soil tests were highly correlated (r2 = 0.97) and similar quantities of P were extracted from the soil by the two tests.", "publicationTitle": "Communications in Soil Science and Plant Analysis", "publisher": "", "place": "", "date": "1985", "volume": "16", "issue": "5", "section": "", "partNumber": "", "partTitle": "", "pages": "467-484", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1080/00103628509367620", "citationKey": "", "url": "http://www.tandfonline.com/doi/abs/10.1080/00103628509367620", "accessDate": "2014-07-09T18:07:06Z", "PMID": "", "PMCID": "", "ISSN": "0010-3624", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "Taylor and Francis+NEJM", "callNumber": "", "rights": "", "extra": "00083", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2014-07-15T16:49:25Z", "dateModified": "2019-05-22T18:42:59Z" } }, { "key": "X5AH4QEC", "version": 86, "library": { "type": "group", "id": 273783, "name": "OSU Soil Fertility Lab", "links": { "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/273783/items/X5AH4QEC", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/osu_soil_fertility_lab/items/X5AH4QEC", "type": "text/html" } }, "meta": { "createdByUser": { "id": 1988889, "username": "soils.lab", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/soils.lab", "type": "text/html" } } }, "lastModifiedByUser": { "id": 4730294, "username": "MannMeredith", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/mannmeredith", "type": "text/html" } } }, "creatorSummary": "Kimaragamage et al.", "parsedDate": "2007-01-01", "numChildren": 2 }, "data": { "key": "X5AH4QEC", "version": 86, "itemType": "journalArticle", "title": "Agronomic and environmental soil test phosphorus in manured and non-manured Manitoba soils", "creators": [ { "creatorType": "author", "firstName": "D.", "lastName": "Kimaragamage" }, { "creatorType": "author", "firstName": "O O", "lastName": "Akinremi" }, { "creatorType": "author", "firstName": "D.", "lastName": "Flaten" }, { "creatorType": "author", "firstName": "J.", "lastName": "Heard" } ], "abstractNote": "Quantitative relationships between soil test phosphorus (STP) methods are needed to guide P management especially in manured soils with high P. Our objectives were: (i) to compare amounts of P extracted by different methods; (ii) to develop and verify regression equations to convert results among methods; and (iii) to establish environmental P thresholds for different methods, in manured and non-manured soils of Manitoba. We analyzed 214 surface soil samples (0–15 cm), of which 51 had previous manure application. Agronomic STP methods were Olsen (O-P), Mehlich-3 (M3-P), Kelowna-1 (original; K1-P), Kelowna-2 (modified; K2-P), Kelowna-3 (modified; K3-P), Bray-1 (B1-P) and Miller and Axley (MA-P), while environmental STP methods were water extractable (W-P), Ca Cl2 extractable (Ca-P) and iron oxide impregnated filter paper (FeO-P) methods. The different methods extracted different amounts of P, but were linearly correlated. For an O-P range of 0–30 mg kg-1, relationships between O-P and other STP were similar for manured and nonmanured soils, but the relationships diverged at higher O-P levels, indicating that one STP cannot be reliably converted to another using a single equation for manured and non-manured soils at environmentally critical P levels (0–100 mg kg-1 O-P). Suggested environmental soil P threshold ranges, in mg P kg-1, were 88–118 for O-P, 138–184 for K1-P, 108–143 for K2-P, 103–137 for K3-P, 96–128 for B1-P, 84–111 for MA-P, 15–20 for W-P, 5–8 for Ca-P and 85–111 for FeO-P. Key words: Phosphorus, soil test phosphorus, manured soils, non-manured soils, environmental threshold , Quantitative relationships between soil test phosphorus (STP) methods are needed to guide P management especially in manured soils with high P. Our objectives were: (i) to compare amounts of P extracted by different methods; (ii) to develop and verify regression equations to convert results among methods; and (iii) to establish environmental P thresholds for different methods, in manured and non-manured soils of Manitoba. We analyzed 214 surface soil samples (0–15 cm), of which 51 had previous manure application. Agronomic STP methods were Olsen (O-P), Mehlich-3 (M3-P), Kelowna-1 (original; K1-P), Kelowna-2 (modified; K2-P), Kelowna-3 (modified; K3-P), Bray-1 (B1-P) and Miller and Axley (MA-P), while environmental STP methods were water extractable (W-P), Ca Cl2 extractable (Ca-P) and iron oxide impregnated filter paper (FeO-P) methods. The different methods extracted different amounts of P, but were linearly correlated. For an O-P range of 0–30 mg kg-1, relationships between O-P and other STP were similar for manured and nonmanured soils, but the relationships diverged at higher O-P levels, indicating that one STP cannot be reliably converted to another using a single equation for manured and non-manured soils at environmentally critical P levels (0–100 mg kg-1 O-P). Suggested environmental soil P threshold ranges, in mg P kg-1, were 88–118 for O-P, 138–184 for K1-P, 108–143 for K2-P, 103–137 for K3-P, 96–128 for B1-P, 84–111 for MA-P, 15–20 for W-P, 5–8 for Ca-P and 85–111 for FeO-P. Key words: Phosphorus, soil test phosphorus, manured soils, non-manured soils, environmental threshold", "publicationTitle": "Canadian Journal of Soil Science", "publisher": "", "place": "", "date": "January 1, 2007", "volume": "87", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "73-83", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Can. J. Soil. Sci.", "DOI": "10.4141/S06-030", "citationKey": "", "url": "http://pubs.aic.ca/doi/abs/10.4141/S06-030", "accessDate": "2014-07-09T17:47:53Z", "PMID": "", "PMCID": "", "ISSN": "0008-4271", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "pubs.aic.ca (Atypon)", "callNumber": "", "rights": "", "extra": "00002", "tags": [], "collections": [ "Z4PDBUWR" ], "relations": {}, "dateAdded": "2014-07-15T16:49:25Z", "dateModified": "2019-05-22T18:42:39Z" } } ]