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PHOSPHATASE ACTIVITY IN SOIL AS INFLUENCED BY INTEGRATED NUTRIENT MANAGEMENT IN TOMATO-ONION CROPPING SYSTEM*.

R. Uma Reddy 1 and M. Suryanarayan Reddy 2
Regional Agricultural Research Station, Jagtial – 505 327, A.P.

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Article ID:
ARCC1545
Online Published:
Abstract
Integrated use of organic manures and inorganic fertilizers were evaluated for soilhealth, crop response and economic feasibility of their use in tomato-onioncropping system. Application of organic manures in conjunction with inorganicfertilizers significantly improved Phosphatase activity of soil. Significant andpositive correlations existed between organic carbon and Phosphatase activity ofthe soil. Based on the results of this study it could be concluded that the combineduse of organic manures at 50 or 75 or 100 per cent level of N with 50 or 75 or 100per cent N through inorganic fertilizers respectively increases the phospataseactivity in the soil. The mean values of phospatase activity ranged from 20.11 to25.01 with FarmYard Manure,20.69 to 25.85 with vermi compost,20.22 to 25.27with poultry manure,20.16 to 25.05 with neam cake treated plots againest control(18.23-19.56) and recommended dose of nitrogen (19.27 to 21.54 μg pnitrophenol g-1 soil h-1)
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