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Large areas in the Soviet Union are subjected to dust storms that harm soils and crops; 52% of the storms occur in the spring, and most are accompanied by easterly winds. The relationship between dust storm devlopment and wind speed is not simple. However, a degree of predictive success occurs when the moisture deficit (the difference between the saturation vapor pressure and the actual vapor pressure) is considered with wind velocity in regression analysis of observed dust storms. Various groupings of dust storm data show that for a given wind velocity, a dust storm is likely when the moisture deficit reaches a certain critical value. Similarly, for a given moisture deficit a dust storm is likely when a certain velocity is attained. These results did not involve a large sample size, but coefficients of correlation were statistically highly significant.

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