Lecture 30 Geographical Areas 1. Summer growing season of at least l50 days. Mild to cold winters. Greater portion coming during the warm season 4.
Annual precipitation exceeds evapotranspiration.
Most of zone between 35o and 55o latitude. Small areas of Australia and N. Zealand 8. In North America Bounded on west by 98th meridian and on south by 37 parallel Includes S. Canada, corn belt Soils of Zone 1. Generally highly productive. Primarily mollisols and alfisols.