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The decomposition of crotonylidene di-urea in soil and the recovery of nitrogen by ryegrass

Published online by Cambridge University Press:  27 March 2009

J. K. R. Gasser
J. K. R. Gasser
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts.
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Summary

Crotonylidene di-urea (CD-urea) in a sandy-loam and two clay-loam soils decomposed slowly at 7°C, and from 8 to 15% was recovered as mineral-N after 24 weeks. At 25°C, it decomposed faster in the sandy-loam than the clay-loam soils; with 100 ppm N, a maximum of 86% was recovered after 16 weeks, and 80% of 1000 ppm N after 24 weeks. Recovery after 24 weeks ranged from 30 to 60% in the clay loams.

Ryegrass grown in pots produced more extra dry matter, containing more N, during 16 weeks when given ammonium sulphate than it did during 50 weeks with CD-urea.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 74 , Issue 1 , February 1970 , pp. 107 - 110
Copyright
Copyright © Cambridge University Press 1970

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References

REFERENCES

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