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THE POTASSIUM STATUS OF SIX LOESSIAL SOILS OF CANTERBURY, NEW ZEALAND, IN RELATION TO RAINFALL AND RATE OF LOESS ACCUMULATION
Author(s) -
HAY M. J. M.,
WALKER T. W.,
ADAMS A. F. R.,
CAMPBELL A. S.
Publication year - 1976
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.1365-2389.1976.tb01993.x
Subject(s) - loess , soil water , illite , geology , soil science , environmental science , potassium , clay minerals , hydrology (agriculture) , mineralogy , geomorphology , chemistry , geotechnical engineering , organic chemistry
Summary A selection of greywacke‐derived loessial soils in Canterbury, New Zealand, was examined to test the hypothesis that soil K status is a function of soil‐forming factors. Soils were selected such that factors besides loess accumulation and rainfall were relatively constant and the effects of each variable could be isolated. Soil K status was evaluated by plant, chemical, and X‐ray diffraction techniques. With increasing rainfall and decreasing rate of loess accumulation soil K status decreased; there was a concurrent decrease in illite and increase in interstratified mineral content of the clay fraction.