Water requirements for increased arid land productivity. (Publication. International Center for Arid and Semi-arid Land Studies. No. 3)
Hargreaves, G.H.
International symposium on increasing food production in arid lands. Monterrey, Nuevo Leon, Mexico, April 22-25 1969. 257-272
1969
Document Number: 281598
The ratio of effective precipitation: potential evapotranspiration is proposed as a useful and valid index for classification of climates.
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