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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.

DOI:
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Article ID:
ARCC1545
Online Published:
Abstract
Integrated use of organic manures and inorganic fertilizers were evaluated for soil
health, crop response and economic feasibility of their use in tomato-onion
cropping system. Application of organic manures in conjunction with inorganic
fertilizers significantly improved Phosphatase activity of soil. Significant and
positive correlations existed between organic carbon and Phosphatase activity of
the soil. Based on the results of this study it could be concluded that the combined
use of organic manures at 50 or 75 or 100 per cent level of N with 50 or 75 or 100
per cent N through inorganic fertilizers respectively increases the phospatase
activity in the soil. The mean values of phospatase activity ranged from 20.11 to
25.01 with FarmYard Manure,20.69 to 25.85 with vermi compost,20.22 to 25.27
with 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 p
nitrophenol g-1 soil h-1)
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