volume 21 issue 1 (march 2001) : 40 - 42
EFFECT OF P LEVELS AND PGRADIENTS ON CHANGES I~ INORGANIC P FRACTIONS WITH DURATION
1Dept. of Soil Science and Agril. Chemistry
J.N. K1ishi Vishwa Vidyalaya, Jabalpur -482004, India.
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Agricultural Science Digest
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volume 21 issue 1 (march 2001) : 40 - 42
EFFECT OF P LEVELS AND PGRADIENTS ON CHANGES I~ INORGANIC P FRACTIONS WITH DURATION
1Dept. of Soil Science and Agril. Chemistry
J.N. K1ishi Vishwa Vidyalaya, Jabalpur -482004, India.
ABSTRACT
Effect of P levels and P gradients on changes in inorganic P fractions upto the harvest of sixth crop was studied in Vertic Ustochept of Jabalpur using wheat-soybean cropping sequence. There was no marked change in Saloid P fraction with P levels, gradient and continuous harvest of six crops. Total inorganic P fractions were higher in high P gradient compared to medium P gradient. AI-P fraction increased upto the harvest of second crop and then decreased continuous with duration. There was a continuous build upof Fe-P fraction upto the harvest of 3rd and 4th crop in medium and high P gradient respectively but afterward this fraction decreased. Red-P fraction increased upto the harvest of 2nd crop and then remain almost constant. Ca-P fraction increased upto the harvest of 3rd and 5th crop in medium and high P gradient, respectively.
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REFERENCES
- Agrawal, S.T. and Bardwaj, V. (1987). J. Indian Soc. Soil Sci. 35:25.
- Jaggi, R.C. (1991) J.lndian Soc. SoilSci. 3~:567.
- More, S.D. and AgaIe, B.N. (1993). J. Indian Soc. Soil Sci. 41:498.
- Peterson, G.w. and Corey, RB. (1966). Soil Sci. Soc. Am. Proc. 30:503
- Santhy, P. et al. (1998). J. Indian Soc. Soil Sci. 46:395.
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In this Article
APC
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Published In
Agricultural Science Digest