Rainfall and evapotranspiration data forthe United States, Canada, and other partsof the world are readily available . In theUnited States, local offices of the U.S.Weather Service can provide rainfall data.Data on evapotranspiration are available ina report by Marvin E . Jensen (ed.),Consumptive Use of Water and IrrigationWater Requirements (cited in the Referencesat the end of this section)
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