Post-harvest care of grain includes screening, sorting (size separation), drying, storage, loading and transportation. The problem of handling grain and seeds in the farm is to ensure undamaged condition of quantity and quality of grain with minimal labor and monetary costs.

The sequence and number of operations for grain screening are chosen depending on the state of basic material (foreign matter and humidity) and its purpose. Accurately chosen technology of grain handling directly and decisively influences economic factors of any production.