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- aggregation classification "A2".
- aggregation creator B184007.
- aggregation creator person.
- aggregation date "2003".
- aggregation format "application/pdf".
- aggregation hasFormat 1260503.bibtex.
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- aggregation isPartOf urn:issn:0016-5301.
- aggregation language "eng".
- aggregation rights "I have transferred the copyright for this publication to the publisher".
- aggregation subject "Earth and Environmental Sciences".
- aggregation title "The role of citric acid as a phosphorus mobilization mechanism in highly P-fixing soils".
- aggregation abstract "Exudation of low molecular weight carboxylates is an important phosphorus (P) acquisition strategy for plants in strongly P-fixing soils. The effect of citrate exudation on P availability was studied in five acid soils with a large organic matter content and a low available P pool. The amount of molybdate reactive P extracted by citric acid 10 mM (0.1–2 mg kg-1) was larger than the molybdate reactive P (MRP) extracted by CaCl2 10-3 M (0.007–0.07 mg kg-1). Both extractants were adjusted to soil pH prior to extraction. Also, the total P content of citric acid extracts (2–44 mg kg-1) far exceeded the total P content of CaCl2 (0.2–1.5 mg kg-1). However, ratios of MRP to total dissolved P (TDP) remained constant. When citric acid was added to the CaCl2 -extracts (the pH of citric acid being adjusted to the pH of CaCl2 , and thus eliminating release of P through acidification) a significant pH increase was noted. Simultaneously, MRP increased significantly in all but one soil. This suggests that the P availability enhancing properties of citric acid are not only due to acidification of the plant rhizosphere, but also to its Al and Fe complexing capacity.".
- aggregation authorList BK440655.
- aggregation endPage "62".
- aggregation issue "1".
- aggregation startPage "55".
- aggregation volume "60".
- aggregation aggregates 1260504.
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