Demand for grain in the Soviet Union has increased, but supply has only partially met the need. While average grain yields have increased on unchanged area, they have become increasingly unstable. The result is that the Soviet Union has shifted some of its domestic production instability to international grain markets. This study examines Soviet grain production stability with time series analysis and finds it related to Soviet net grain imports and imports from the United States. It also examines some recent Soviet efforts to reduce grain yield instability.