Climatic classification of the semi-arid tropics in relation to farming systems research uri icon


  • ICRISAT has a mandate to increase and stabilize the agricultural production of semi-arid tropics. The region is characterized by a highly variable low seasonal rainfall. A number of generalized climatic classification approaches have been reviewed; of these the approach suggested by Troll to distinguish climates is important. The dry semi-arid tropics need to be mapped on the basis of the large volume of rainfall and evaporation data that is currently available. It is pointed out that agroclimatic classification of the semi-arid tropics aims at addressing specific problems like risk to crops/cropping patterns, likelihood of intra- and interseasonal droughts and adequacy of soil moisture in the sowing zone for dry sowing. The selection of criteria for each classification should be based on empirically derived parameters

publication date

  • 1980