Agroclimatology of Rayalaseema

A.R. Subramaniam, M.V. Rao

Abstract



This paper deals with some aspects of agroclimatology of Rayalaseema region, the southern part of Andhra Pradesh. Climatic features of the region are discussed briefly. An attempt has been made to classify areas of rice growing potential in the region. This study shows that the whole region is not favourable for rainfed cultivation of rice crop except Srikalahasti in Chitoor District, where it can be grown as rainfed crop in rabi season. The agro-ecological zonation of the region is presented with a view for the development of rainfed agriculture. The distribution of index of moisture adequacy is studied for Kharif and Rabi seasons along with the cropping pattern. It can be concluded that the area under paddy may be decreased in the region during Kharif and Rabi seasons where irrigation facilities are not available and the area under Jowar and pulses may be increased. Water availability periods have been computed according to the methods of Cocheme and Franquin, Krishnan. It is observed that the humid period is less in the region and hence it is appropriate to go for short duration varieties to prevent the crops from undergoing water stress. The accumulated PE, PE/2 and AE during the crop growing season under water balance diagrams to significant agricultural drought years to Jowar, Bajra and Groundnut are presented

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