High degree of insect and disease resistance High plant populations Chemical weed and insect control Europe and Asia 1. Potato and sugar beets important. Among highest yields in world 5. Farms in Europe generally smaller than in North America. Higher proportion of land devoted to forages.
Crop rotation is followed more regularly.
China multiple cropping and intercropping at very high intensity. As many as 12 crops in single season. Some of most productive parts of USSR in this zone. Ukraine more subject to drought than corn belt. 8 or 6 field rotations 14.