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Changes in soil fertility status as influenced by continuous cropping and fertilizer application

Published online by Cambridge University Press:  27 March 2009

K. N. Sharma ,
Bijay Singh ,
D. S. Rana ,
M. L. Kapur  and
J. S. Sodhi
K. N. Sharma
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, Punjab, India
Bijay Singh
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, Punjab, India
D. S. Rana
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, Punjab, India
M. L. Kapur
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, Punjab, India
J. S. Sodhi
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, Punjab, India
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Summary

Changes in soil fertility status brought about by the application of P and K fertilizers and farmyard manure (FYM) to a fixed wheat-maize rotation for 10 years in a calcic ustochrept are reported. The treatments comprised three rates of P (0, 30 and 60 kg P2O5/ha), two rates of K (0 and 30 kg K2O/ha) and two rates of FYM (0 and 15 t/ha) applied to maize or wheat alone or to both the crops. Organic carbon and available P and K contents of the soil increased significantly with the addition of FYM. P application at 60 kg P2O5/ha nearly maintained the original level of available P even after 10 years of continuous cropping. However, a considerable and highly significant increase in available P was obtained with the combined application of P and FYM. Available K status of the soil remained more or less unaffected by K application. Organic carbon content, and available P and K contents were significantly higher in the plots that received fertilizers and manure for both the crops than in those where the application was to maize or wheat alone.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 102 , Issue 1 , February 1984 , pp. 215 - 218
Copyright
Copyright © Cambridge University Press 1984

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