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Effect of time and method of application on the relative efficiency of prilled urea and urea super granules for rice

Published online by Cambridge University Press:  27 March 2009

R. Prasad ,
S. Singh  and
R. De
R. Prasad
Affiliation:
Division of Agronomy, Indian Agricultural Research Institute, New Delhi – 110 012, India
S. Singh
Affiliation:
Division of Agronomy, Indian Agricultural Research Institute, New Delhi – 110 012, India
R. De
Affiliation:
Division of Agronomy, Indian Agricultural Research Institute, New Delhi – 110 012, India
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Summary

A field experiment was made on rice during the rainy seasons of 1982 and 1983 to study the relative efficiency of prilled urea and urea super granules (USG) applied broadcast or deep placed at different times. USG gave more, longer and heavier panicles with a higher percentage of filled grains than prilled urea. Deep placement of 60 kg N/ha as USG in two applications (half 10 days after transplanting and half at panicle initiation) gave the same grain yield as 120 kg N/ha of prilled urea applied half at final puddling and half at panicle initiation. Urea super granules, therefore, hold considerable promise as a nitrogen fertilizer for rice.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 103 , Issue 3 , December 1984 , pp. 539 - 542
Copyright
Copyright © Cambridge University Press 1984

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