Effect of Plant Nitrogen Status on Defoliation of Short-Season Upland Cotton
| dc.contributor.author | Nelson, J. M. | |
| dc.contributor.author | Hart, Gary | |
| dc.contributor.editor | Silvertooth, Jeff | en_US |
| dc.date.accessioned | 2012-02-02T19:20:18Z | |
| dc.date.available | 2012-02-02T19:20:18Z | |
| dc.date.issued | 1992-02 | |
| dc.identifier.uri | http://hdl.handle.net/10150/208668 | |
| dc.description.abstract | Field studies have been conducted over a four year period at the Maricopa Agricultural Center to determine the influence of nitrogen (N) fertility level on the effectiveness of chemical defoliants for short- season cotton production. Excessive N resulted in dense foliage and cotton that was difficult to defoliate. When plants were deficient in N from mid-season to termination, defoliants were very effective, but lint yields were reduced. The effectiveness of defoliants decreased as the petiole NO₃-N content increased. The optimum fertility program for short-season cotton is one that provides sufficient N during the season to produce maximum lint yields, but allows the crop to become deficient in N at the end of the season, prior to chemical defoliation. | |
| dc.language.iso | en_US | en_US |
| dc.publisher | College of Agriculture, University of Arizona (Tucson, AZ) | en_US |
| dc.relation.ispartofseries | 370091 | en_US |
| dc.relation.ispartofseries | Series P-91 | 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 Defoliation of Short-Season Upland Cotton | 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 | 2018-08-26T01:47:59Z | |
| html.description.abstract | Field studies have been conducted over a four year period at the Maricopa Agricultural Center to determine the influence of nitrogen (N) fertility level on the effectiveness of chemical defoliants for short- season cotton production. Excessive N resulted in dense foliage and cotton that was difficult to defoliate. When plants were deficient in N from mid-season to termination, defoliants were very effective, but lint yields were reduced. The effectiveness of defoliants decreased as the petiole NO₃-N content increased. The optimum fertility program for short-season cotton is one that provides sufficient N during the season to produce maximum lint yields, but allows the crop to become deficient in N at the end of the season, prior to chemical defoliation. |
