Effect of Plant Nitrogen Status on Effectiveness of Defoliants for Short Season Cotton Production
| dc.contributor.author | Nelson, J. M. | |
| dc.contributor.author | Hart, G. | |
| dc.contributor.editor | Silvertooth, Jeff | en_US |
| dc.contributor.editor | Bantlin, Marguerite | en_US |
| dc.date.accessioned | 2012-02-01T21:27:45Z | |
| dc.date.available | 2012-02-01T21:27:45Z | |
| dc.date.issued | 1991 | |
| dc.identifier.uri | http://hdl.handle.net/10150/208323 | |
| dc.description.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. | |
| dc.language.iso | en_US | en_US |
| dc.publisher | College of Agriculture, University of Arizona (Tucson, AZ) | en_US |
| dc.relation.ispartofseries | 370087 | en_US |
| dc.relation.ispartofseries | Series P-87 | en_US |
| dc.subject | Agriculture -- Arizona | en_US |
| dc.subject | Cotton -- Arizona | en_US |
| dc.subject | Cotton -- Crop management | en_US |
| dc.title | Effect of Plant Nitrogen Status on Effectiveness of Defoliants for Short Season Cotton Production | en_US |
| dc.type | text | en_US |
| dc.type | Article | en_US |
| dc.identifier.journal | Cotton: A College of Agriculture Report | en_US |
| refterms.dateFOA | 2018-08-26T01:10:42Z | |
| html.description.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. |
