The Importance of Illite as a Source of Potassium in Nebraska Soils1
- Fawzi M. A. H. Abed and
- James V. Drew2
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.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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