Dvuruchki

(Russian, “two hands”), winter-spring crops, a biological group of varieties and species of agricultural plants that grow as winter crops when planted in the fall and as spring crops when planted in the spring. The term dvuruchki arose in the times of three-field crop rotation, when each field was called a ruka (“hand”) and the dvuruchki were grown on two fields. Dvuruchki are widely distributed among wild plants, as well as among cultivated crops (for example, rye, wheat, and barley). The economic value of dvuruchki consists in the possibility of carrying over a planting to the spring in the event of an unfavorable autumn and of adding seeds of the same variety to a sparse autumn planting in the spring. Dvuruchki are distinguished for their winter hardiness and resistance to fungal diseases.