Effect of Plant Nitrogen Status on Effectiveness of Defoliants for Short Season Cotton Production

Persistent Link:
http://hdl.handle.net/10150/208323
Title:
Effect of Plant Nitrogen Status on Effectiveness of Defoliants for Short Season Cotton Production
Author:
Nelson, J. M.; Hart, G.
Issue Date:
1991
Publisher:
College of Agriculture, University of Arizona (Tucson, AZ)
Journal:
Cotton: A College of Agriculture Report
Abstract:
A field study was conducted at the Maricopa Agricultural Center to determine the influence of nitrogen fertility level on the effectiveness of defoliants for short-season cotton production. Increasing the nitrogen fertility level from 30 to 130 lbs N/A decreased lint yields from 3.2 to 26 bales /A. High residual soil N favored the use of a low N fertility rate. Defoliation treatments were most effective at the 30 lbs. N/A fertility level. Increasing the application rate of Dropp from 0.2 to 0.4 lbs. a.i./A increased the percent defoliation. There was a significant linear decrease in the effectiveness of defoliants as the petiole NO₃-N content increased from 300 to 7000 ppm.
Keywords:
Agriculture -- Arizona; Cotton -- Arizona; Cotton -- Crop management
Series/Report no.:
370087; Series P-87

Full metadata record

DC FieldValue Language
dc.titleEffect of Plant Nitrogen Status on Effectiveness of Defoliants for Short Season Cotton Productionen_US
dc.contributor.authorNelson, J. M.en_US
dc.contributor.authorHart, G.en_US
dc.date.issued1991-
dc.publisherCollege of Agriculture, University of Arizona (Tucson, AZ)en_US
dc.identifier.journalCotton: A College of Agriculture Reporten_US
dc.description.abstractA field study was conducted at the Maricopa Agricultural Center to determine the influence of nitrogen fertility level on the effectiveness of defoliants for short-season cotton production. Increasing the nitrogen fertility level from 30 to 130 lbs N/A decreased lint yields from 3.2 to 26 bales /A. High residual soil N favored the use of a low N fertility rate. Defoliation treatments were most effective at the 30 lbs. N/A fertility level. Increasing the application rate of Dropp from 0.2 to 0.4 lbs. a.i./A increased the percent defoliation. There was a significant linear decrease in the effectiveness of defoliants as the petiole NO₃-N content increased from 300 to 7000 ppm.en_US
dc.subjectAgriculture -- Arizonaen_US
dc.subjectCotton -- Arizonaen_US
dc.subjectCotton -- Crop managementen_US
dc.identifier.urihttp://hdl.handle.net/10150/208323-
dc.relation.ispartofseries370087en_US
dc.relation.ispartofseriesSeries P-87en_US
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