Measurement of available phosphate content of some Spanish soils

Eight Spanish and seven English soils were used to examine methods of determining available soil phosphate. The reference value for the amount of phosphate available was that taken up by six successive cuts of ryegrass grown in a pot experiment. The L-value had the best overall correlation (r = 0.94...

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Bibliographic Details
Published in:Plant and soil 1973-10, Vol.39 (2), p.399-412
Main Authors: Crisanto, T, Sutton, C.D
Format: Article
Language:English
Subjects:
Acid soils
Adsorption
Alkaline soils
Peat soils
Phosphates
Resins
Sand soils
Soil plant interactions
Soil science
Soil solution
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Summary:Eight Spanish and seven English soils were used to examine methods of determining available soil phosphate. The reference value for the amount of phosphate available was that taken up by six successive cuts of ryegrass grown in a pot experiment. The L-value had the best overall correlation (r = 0.94) but is a lengthy determination. Its laboratory analogue, the E-value, was more rapid and equivalent, with the exception of high-clay soils where it gave anomalous values. An anion-exchange resin technique was most suitable for routine measurement and predicted available phosphate (r = 0.88) satisfactorily.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF00014806