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dc.contributor.authorNelson, J. M.
dc.contributor.authorHart, G.
dc.contributor.editorSilvertooth, Jeffen_US
dc.contributor.editorBantlin, Margueriteen_US
dc.date.accessioned2012-02-01T21:27:45Z
dc.date.available2012-02-01T21:27:45Z
dc.date.issued1991
dc.identifier.urihttp://hdl.handle.net/10150/208323
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.
dc.language.isoen_USen_US
dc.publisherCollege of Agriculture, University of Arizona (Tucson, AZ)en_US
dc.relation.ispartofseries370087en_US
dc.relation.ispartofseriesSeries P-87en_US
dc.subjectAgriculture -- Arizonaen_US
dc.subjectCotton -- Arizonaen_US
dc.subjectCotton -- Crop managementen_US
dc.titleEffect of Plant Nitrogen Status on Effectiveness of Defoliants for Short Season Cotton Productionen_US
dc.typetexten_US
dc.typeArticleen_US
dc.identifier.journalCotton: A College of Agriculture Reporten_US
refterms.dateFOA2018-08-26T01:10:42Z
html.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.


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