maps which reflect climatic conditions as they relate to the objects and processes of agricultural production.
The first agroclimatological maps were published by P. I. Brounov in Russia in 1913; they were agroclimatological zoning maps and maps for forecasting dry decades in European Russia. Maps of this sort may show (1) the entire complex of agroclimatological resources of a given territory, as does the Transbaikal Atlas of 1967; (2) climatic conditions as they concern the cultivation of particular crops, such as the sugar beet—for instance, the 1948 Bioclimatic Atlas of Schleswig-Holstein; (3) particular forms of climatic resources of agriculture, in indexes most suitable for practical purposes, such as the sum of favorable-temperature periods, duration of vegetation period, or moisture content of the soil, as does the 1960 USSR Agricultural Atlas; (4) climatic phenomena harmful to agriculture—for example, the charts showing dangerous frosts, damage to grain from dry winds, and probability of winter crop freezing, of the 1964 Agroclimatological Atlas of the Ukrainian SSR; and (5) schedules of crop growth and various agricultural operations, as found in the Atlas of Sweden, 1953—. Agroclimatological maps are used in the planning and direction of agriculture.
IU. G. KEL’NER