The Journal of Agricultural Science

Table of Contents - 1978 - Volume 91, Issue 01  

Research Article

Leaching of potassium in illitic soil profiles as influenced by long-term application of inorganic fertilizers

Bijay Singha1 and G. S. Sekhona1

a1 Department of Soils, Punjab Agricultural University, Ludhiana 141004, India

Summary

The correlation between sorption and mobility of potassium in illitic soils has been used to compare K leaching in profiles under different fertilizer treatments in longterm experiments. Estimates of potassium saturation of the cation exchange capacity in 15 cm soil layers to a depth of 225 cm indicated maximum leaching of K in unfertilized soils. Application of N, P and K increased K uptake by plants, reduced K saturation and thus its leaching.

(Received January 11 1978)

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