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1. THE PATTERN OF LAND USE IN RELATION TO TARGET GRAINS IN THE USSR AND THE PROBABLE SPREAD OF STEM RUST ON CEREAL GRAINS

   There has certainly been no shift in the weather pattern, and the use of average yields gives a basic picture ... of annual fluctuations in weather and other growing conditions on produc- tion in other years. In several ... The weather conditions in 1932-33 were generally favorable, and, in fact, the production estimated at 66,4 ...