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-~-}J~SL-t L ra; - <br />MODIFIED BLANEY-GRIDDLE FORMULA Curve 13 <br />ESTIMATE OF MONTHLY AND SEASONAL CONSUMPTIVE USE OF WATER FOR Season 4/15-8/18 <br />Grain GROWN IN THE Blanca AREA <br />Month Midpoint Oays Mean Air Daylight Consumptive Climatic Growth Consump- 14onthly Mean Effective Irrigation <br />or of in Temp. Hours Use Coef- Stage tive Use Consump- Ppt. Rainfall Demand <br />Period Period Period (°F) (%) Factor ficient Coeff. Coeff. tive Usr (ins) (ins) (ins) <br />t p f O1 ~ kt kc k = kt• kc u = k•f rt re ui = u-re <br />Jan <br />Feb • <br />is r <br />Apr 15-30 22 15 44.6 4.56 2.03 0.46 0.37 0.17 U.35 0.33 0.17 0.18 <br />V <br />May <br />15 <br />31 <br />48.0 <br />9.87 <br />4.74 <br />0.52 <br />0.81 <br />0.42 <br />1.99 <br />0.87 <br />0.58 <br />1.41 <br />Jun 15 30 60.9 9.92 6.04 0.74 1.30 0.96 5.80 0.71 0.58 5.22 <br />Jul 15 31 64.7 10.08 6.52 0.80 0.95 0.76 4.96 1.41 1.10 3.86 <br />Aug 1-18 9 18 62.4 5.56 3.47 0.77 0.20 0.15 0.52 0.96 0.52 0.00 <br />Sep <br />Oct • <br />Nov <br />Dec <br />,lnnual or Seasonal Total 13.62 4.28 2.95 10.67 <br />