ABSTRACT
The weather and climate exert a direct and considerable effect on one of the most important social activities—agriculture, especially farming. The World Climate Program and the United Nations Environmental Program have included, as one of their major, integral parts, the study of climatic effects on social activities, which emphasizes agricultural-climatology problems. International scientific programs that address effects of climate on social activities are very timely because consequences of the effect of expected future climate change on agriculture can influence world and regional food situations considerably. In the post-war years in the USSR, atmospheric precipitation conditions that influence crop yields were comparatively favorable for a rather long time. American scientists have been interested in the problem of the impact of anthropogenic climate change on agriculture. Data on wheat and corn yields in the North American agricultural region show that there was a noticeable tendency for crop yields to drop and for crop-yield variability to increase in the 1930s.
