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Article: Mineral sources of potassium to plants for seven soils from south-western Australia.
- Article from:
- Australian Journal of Soil Research
- Article date:
- December 15, 2002
- Author:
CopyrightCOPYRIGHT 2002 CSIRO Publishing. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Introduction
An important consideration influencing the availability to plants of non-exchangeable K ([K.sub.nex]) in soils is the rate of release of this form of K to exchangeable and dissolved K pools (Feigenbaum et al. 1981). Particle size, mineral species, degree of weathering, and amounts of structural K are important factors that regulate the release of mineral K to soil solution and its availability to plants. Soil environment factors including soil acidity, soil water content, temperature, and the concentration of K and other ions in soil solution also affect the release of non-exchangeable K to plants (Martin and Sparks 1985; Kirkman et al. 1994). For ...