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Comparison of methods for assessing the availability of potassium and phosphorus in field soils to black currants and strawberries
Author(s) -
Redmond W. J.
Publication year - 1969
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740201205
Subject(s) - potassium , phosphorus , nutrient , soil water , chemistry , phosphate , agronomy , extraction (chemistry) , environmental chemistry , environmental science , soil science , biology , chromatography , biochemistry , organic chemistry
The validity of activity ratio measurements for potassium, and ion potential measurements for phosphate as criteria for the availability of these nutrient elements to blade currants and strawberries growing in the field was compared with the results obtained by determinations of exchangeable potassium and acetic acid‐soluble phosphorus for three different soils. The correlations between soil nutrient values and uptake by the plants, as evidenced by leaf nutrient content, were similar for each element irrespective of which method was used, so that for the particular field experiments concerned there would appear to be no advantage in replacing the straightforward extraction determinations by ion activity determinations for diagnostic purposes.