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Nutrient Assessment of a Dryland Wheat Agroecosystem after 12 Years of Biosolids Applications

Dep. of Soil and Crop Sci., Colorado State Univ., Fort Collins, CO, 80523-1170

View larger version (29K): [in this window] [in a new window]   Fig. 1. Total wheat-grain yields for the first 6 yr (1993–1999), second 6 yr (1999–2005), and for 12 yr (1993–2005) of Littleton/Englewood biosolids application.

View larger version (19K): [in this window] [in a new window]   Fig. 2. Littleton/Englewood biosolids and N fertilizer effects on the second 6 yr (1999–2005) grain N uptake by dryland wheat near Bennett, CO.

View larger version (23K): [in this window] [in a new window]   Fig. 3. Littleton/Englewood biosolids and N fertilizer effects on cumulative 12 yr (1993–2005) grain N uptake by dryland wheat near Bennett, CO.