CIESIN Reproduced, with permission, from: Gadgil , S., A. K. S. Huda, N. S. Jodha, R. P. Singh, and S. M. Virmani. 1988. The effects of climatic variations on agriculture in dry tropical regions of India. In Assessments in semi-arid regions, ed. M. L. Parry, T. R. Carter, and N. T. Konijn, 495-521. Vol. 2 of The impact of climatic variations on agriculture. Dordrecht, The Netherlands: Kluwer Academic Publishers.
Table 1.5 from "The Effects of Climatic Variations on Agriculture".