INDEX. 71 



Page. 



Tulare, Cal., evaporation 18 



Utah, evaporation table 19 



rainfall, annual 8 



map 44 



relation to yield of wheat 23-24 



table 64 



run-off during torrential rains, experiments 15-16 



Washington County, relation of rainfall to yield of wheat 23-24 



wheat production, cost per acre 24 



Washington, evaporation table 19 



rainfall map 45 



table 65 



Wheat, winter, adaptability to Great Basin 13-14 



yield and cost per acre 23-24 



relation of rainfall 23-24, 25, 26-30 



Widtsoe, J. A., on farming in Utah 14 



Wllliston, N. Dak., evaporation 18 



Wisconsin, evaporation table 19 



Wyoming, evaporation table 19 



rainfall map 45 



table 66 



Yield, relation of rainfall in arid regions 23-32 



Columbia Basin 24-25 



Great Basin 23-24 



Great Plains 21-22 



tillage comparisons 31-32 



Yuma, Ariz., evaporation 18 



188 



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