Foliar Application of Urea and Triazone Nitrogen to Cotton |
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| Authors: | Bob Wiedenfeld B Webb Wallace Frank Hons |
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| Institution: | 1. Texas Agrilife Research , Texas A&2. M University Research and Extension Center , Weslaco, Texas, USA |
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| Abstract: | Upland cotton (Gossypium hirsutum) requires adequate nitrogen (N) for optimum yields. Foliar applications of urea to supplement soil applied N have been tried for many years across the Cotton Belt, but responses have been highly variable. No published information is available regarding response by irrigated cotton to foliar applied N in subtropical South Texas. This study investigated the response of cotton to foliar applied urea and triazone N over a three-year period near Weslaco, Texas. In all years, foliar applied urea tended to increase seed cotton yield when soil applied N was limiting. In the absence of soil applied N, the increase due to foliar urea was significant in two of the three years (28.7 and 15.7% increases). Foliar applied triazone N was ineffective at increasing seed cotton yields. |
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| Keywords: | soil N application N uptake fertilizer uptake efficiency |
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