THE GEOGRAPHICAL THINKING OF N.I. VAVILOV

Much has been published recently about Academician N.I. Vavilov, a seminal scientist with broad horizons. This article is limited to his geographical contributions and interests. His early study of agriculture in Afghanistan revealed his keen powers of field observation and his deep geographic orientation. This work won him the Przheval'skiy Gold Medal of the Geographical Society. He organized a network of experimental stations across the broad and diverse expanses of the Soviet Union to test the geographical limits of crops. He carried out numerous studies of mountain agriculture in many parts of the globe, noting that the isolation and the patchwork of critical environmental conditions in mountains favored the divergence of species, forms, and types of the wild ancestors of cultivated plants. This led to his trail-blazing identification and field investigation of hearths (centers) of origin of cultivated plants, of their diffusion, of areas of ancient agriculture, and to formulation of principles of geographical variability. This work has been continued in recent years by others. Vavilov had close connections with geography, with several geographers, and with the Geographical Society of the USSR (translated by Andrew R. Bond).