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Effect of Drying Upon Availability of Potassium in Parsons Silt Loam Surface Soil and Subsoil 1
Author(s) -
Scott T. W.,
Smith F. W.
Publication year - 1957
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1957.00021962004900070010x
Subject(s) - subsoil , loam , potassium , agronomy , soil water , silt , chemistry , environmental science , soil science , geology , biology , paleontology , organic chemistry
Synopsis Drying of both surface and subsoil approximately doubled exchangeable potassium content. Extensive cropping of soils not fertilized with KCI apparently reduced exchangeable potassium to near minimum levels. However, plant uptake of potassium always was greater from previously dried soil than from that kept continuously moist. A single unit of exchangeable potassium in continuously moistened soil was from 20 to 26% more available than the same unit in dried soil. Similarly a single unit in surface soil appeared to be from 10 to 16% more available than a single unit in subsoil.