Influence of High Density Multispecies Cropping on the P and K Forms in the Soil

Abstract

An account of gain or loss of different fractions of P and K in the soil under the coconut based high density multispecies cropping system over a period of three years has been worked out in a light textured soil at C. P. C. R. I. Kasaragod. In general, all the P fractions increased due to the high density in three year period. Building up of Fe-P in the soil was not marked as compared to Al-P and Ca-P. The Al-P content in the soil of coconut basin of multispecies as well as monocrop is very high at 0-25 cm and 25-50 cms. Wide variation in this fraction in the interspaces of high density and mono-cropping was noticed. There was a general increase in all the fractions of K over a period of three years cropped with different species. However, soil sampled from bread-fruit, nutmeg, coffee, pineapple and subabul showed negative gain. Fixed K showed an accumulation in the basins of the crop species over three years. Water soluble K was more in monocrop basin as compared to the multispecies at 0-25 and 25-50 cms depth. Soil from interspace showed reverse trend.

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Citation

J.Plantn.Crops 1989 v-17 i-1 p-36-43

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