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The Importance of Illite as a Source of Potassium in Nebraska Soils
Author(s) -
Abed Fawzi M. A. H.,
Drew James V.
Publication year - 1966
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1966.03615995003000020029x
Subject(s) - illite , soil water , silt , potassium , environmental science , medicago sativa , phosphorus , geology , clay minerals , agronomy , mineralogy , soil science , chemistry , biology , organic chemistry , paleontology
The uptake of nonexchangeable K by alfalfa ( Medicago sativa L.) from samples of the surface layers of 8 Nebraska soils in a greenhouse experiment was more closely related to illite contributed to the soils by fine silt ( r = 0.85) than to K‐bearing minerals contributed to the soils by other separates. Measurements of exchangeable K may underestimate the K‐supplying power of Nebraska soils for alfalfa when relatively large amounts of illite are contributed to the soils by fine silt.