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Nitrogen Response in Cotton as Affected by Tillage System and Irrigation Level

^a Texas A&M Univ. Texas Agricultural Experiment Station, RR 3, Box 219, Lubbock, TX 79401
^b Grassland Soil & Water Research Lab., USDA-ARS, Temple, TX 76502

View larger version (23K): [in a new window]   Fig. 1. Lint yield response to irrigation (averaged across tillage system) (a) 1996 (averaged across N rate), (b) 1997 (by N rate), and (c) 1998 (by N rate).

View larger version (29K): [in a new window]   Fig. 2. Lint yield response to N fertilizer by irrigation level (averaged across tillage system) (a) 1997, and (b) 1998.

View larger version (26K): [in a new window]   Fig. 3. Optimal Nitrogen fertilizer response of cotton lint yields at 75% evapotranspiration replacement irrigation level by tillage system (a) 1997, and (b) 1998.

View larger version (26K): [in a new window]   Fig. 4. Chlorophyll meter sufficiency indices of conservation tillage cotton as affected by N fertilizer rate (a) 1996, and (b) 1997; (c) 1998, conventional and conservation tillage.