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Cattle Gain and Crop Yield for a Dryland Wheat-Sorghum-Fallow Rotation

^a USDA-Agricultural Research Service, Conservation and Production Research Laboratory, P.O. Drawer 10, Bushland, TX 79012-0010
^b Dep. Animal Science, 209 Animal Sciences, Auburn Univ., Auburn, AL. 36849
^c Texas AgriLife Research and Extension Center, 6500 Amarillo Blvd. W., Amarillo, TX, 79106

View larger version (46K): [in this window] [in a new window]   Fig. 1. The wheat-sorghum-fallow (WSF) crop sequence diagrammed as a repeating 3-yr cycle beginning with planting wheat in September. Vegetative wheat growth provides forage during the first rotation phase in Year 1 and sorghum stover is supplied during the postgrain-harvest fallow after sorghum rotation phase in Year 3. Potential grazing of sorghum stover and vegetative wheat growth could be possible as early as December and continued through March.

View larger version (29K): [in this window] [in a new window]   Fig. 2. Cumulative monthly precipitation during the October through June growing season for wheat is plotted (dashed lines) by the grain harvest years 2000 through 2007. The long-term average cumulative precipitation is shown as a solid line.

View larger version (29K): [in this window] [in a new window]   Fig. 3. Cumulative monthly precipitation during the June through November growing season for sorghum is plotted (dashed lines) for the years 2000 through 2007. The long-term average cumulative precipitation is shown as a solid line.