EFFECT OF CONTINUOUS MANURING AND FERTILISATION ON SOIL PHOSPHORUS FRACTIONS IN AN ALFISOL UNDER RICE-RICE CROPPING SYSTEM

C.UDAYASOORIAN AND U.S.SREE RAMULU

doi:https://doi.org/10.29321/MAJ.10.A01864

Madras Agricultural Journal

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EFFECT OF CONTINUOUS MANURING AND FERTILISATION ON SOIL PHOSPHORUS FRACTIONS IN AN ALFISOL UNDER RICE-RICE CROPPING SYSTEM

Author: C.UDAYASOORIAN AND U.S.SREE RAMULU,

p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 78, Issue: may-aug,

DOI:https://doi.org/10.29321/MAJ.10.A01864

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Abstract

Continuous manuring and fertilization in an intensinve cropping on an Alfisol resulted in less depletion of inorganic P fractions viz., Saloid-P (16.6%), Fe-P (14.1%), Al-P (14.4%), Ca-P (16.5%) and more of organic-P (40.6%) in surface soil. Regular addition of green leaf manure (GLM) enhanced saloid-P, A1-P and Fe-P and Fe-P whereas farm yard manure (FYM) addition influenced Ca-P and organic-P. Continuous P addition either alone or in combination with Nand Kenhanced both inorganic and organic-P fractions than the treatments haveing no P.

Keywords: Continuous manuring, Phosphorus fractions.

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