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Yield and Height of Cotton as Affected by Weed Density and Nitrogen Level

Published online by Cambridge University Press:  12 June 2017

E. L. Robinson
E. L. Robinson*
Affiliation:
Field Crops Util. and Market. Res. Lab., Agr. Res. Serv., U.S. Dep. Agr., Athens, GA 30604
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Abstract

Cotton (Gossypium hirsutum L. ‘Stoneville 7A’) grown for 3 yr in competition with various weed densities and nitrogen levels showed annual weeds could reduce cotton heights as much as 75% and cotton yields as much as 88%. Cotton yields were increased by 18 to 30% by adding nitrogen to plots with no weeds. In 1973, cotton supplied with 224 kg/ha of nitrogen could tolerate up to 50% weeds without loss of yield. Weeds left to grow and reseed with no control resulted in increasingly greater competition with each succeeding year.

Information

Type
Research Article
Information
Weed Science , Volume 24 , Issue 1 , January 1976 , pp. 40 - 42
Copyright
Copyright © 1976 by the Weed Science Society of America 

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References

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