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Economically Optimal Nitrogen Fertilization for Yield and Protein in Hard Red Spring Wheat

^a Dep. of Agric. and Resour. Econ., Washington State Univ., Pullman, WA 99164-6210
^b USDA-ARS, Pullman, WA 99164
^c Dep. of Crop and Soil Sci., Washington State Univ., Pullman, WA 99164-6420

View larger version (15K): [in a new window]   Fig. 1. Grain yield and protein response to applied N per Eq. [1] and [2], respectively.

View larger version (32K): [in a new window]   Fig. 2. Net returns response to N fertilization. Note P/D = protein premium/discount.

View larger version (23K): [in a new window]   Fig. 3. Economically optimal N levels in conventional-tillage hard red spring wheat for varying premium and discount (P/D) price structures.

View larger version (22K): [in a new window]   Fig. 4. Economically optimal protein levels in conventional-tillage hard red spring wheat for varying premium and discount (P/D) price structures.