 A further stimulus was provided in the first years of the Revolution by the Bolshevik policy of requisitioning peasant produce.Fruit and vegetables were exempt from this policy, and this resulted in a strong swing from grain farming to kitchen and market gardening.In the grain-producing regions (Black-Earth belt and North Caucasia) the garden economy increased its share of peasant commodity production from 3.3% in 1913 to 12.2% in 1920, while the field economy declined from 62.6% to 39.3% in the same period.