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Movement of potassium in an Ustochrept soil profile in a long-term fertilizer experiment

Published online by Cambridge University Press:  27 March 2009

A. N. Ganeshamurthy  and
C. R. Biswas
A. N. Ganeshamurthy
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana 141 004, India
C. R. Biswas
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana 141 004, India
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Summary

Downward movement of potassium (K) was studied in the soil profiles of a longterm fertilizer experiment. The distribution of different forms of K and the percentage K saturation of the CEC of soil, at various depths of the differentially treated plots, indicated that applied K moved down to 75 cm depth in the high-K plots after nine cycles of a maize-wheat-cow peas crop rotation. However, movement of K was not noticed in plots not given K fertilizers. Plant uptake of K far exceeded the amounts of applied K. Application of K fertilizer reduced the release of K from the non-exchangeable reserves. Forms of K and the percentage K saturation of the CEC of soils were significantly correlated.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 102 , Issue 2 , April 1984 , pp. 393 - 397
Copyright
Copyright © Cambridge University Press 1984

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