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Plant uptake of exchangeable and non‐exchangeable potassium. II. Influence of soil type on uptake by onion roots
Author(s) -
MITSIOS I. K.,
ROWELL D. L.
Publication year - 1987
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1987.tb02123.x
Subject(s) - potassium , soil water , chemistry , diffusion , environmental chemistry , agronomy , soil science , environmental science , biology , physics , organic chemistry , thermodynamics
SUMMARY Measurements and predictions of uptake of non‐exchangeable K have been made for three soils. Exchangeable K is important in controlling the extent to which non‐exchangeable K is used; rate of diffusion of exchangeable K seems less important. Rate of release of non‐exchangeable K did not vary much between soils, but critical release concentrations in solution varied from 33 to 85 μM with little obvious effect on the extent of use of non‐exchangeable K.