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2258. Greb, B.W.. 1979. Technology and wheat yields in the central Great Plains: Commercial advances.. J. Soil and Water Conservation, 34:269-273.
Increased yields due to: a)better summer fallow practices; b)better weed control; c)better wheat varieties. T: Cycles of wheat yields trends. Progress of yields and water use efficiency. Yields in 8 climates/3 decades. Planted wheat acres abandoned in 8 climates.