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Time and source of nitrogen application in rice and wheat

Published online by Cambridge University Press:  27 March 2009

O. P. Meelu ,
S. Saggar ,
M. S. Maskina  and
R. S. Rekhi
O. P. Meelu
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, India
S. Saggar
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, India
M. S. Maskina
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, India
R. S. Rekhi
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, India
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Summary

The results of four field experiments conducted for 2 or 3 years on two soils, loamy sand (Typic Ustipsamments) and silty clay loam (Natric Ustochrept) showed that in rice, application of N in three equal amounts was more efficient than one or two applications, irrespective of source of N and type of soil. The results further showed that application of the first dose of N 7 days after transplanting rice was more beneficial than its application at transplanting. Calcium ammonium nitrate was significantly inferior to urea and/or ammonium sulphate for rice in both soils. There were no significant differences in wheat yield, N concentration or uptake due to time and source of N application.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 109 , Issue 2 , October 1987 , pp. 387 - 391
Copyright
Copyright © Cambridge University Press 1987

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