All agro-ecological zones | ||||||
Region I | Low rainfall area with less than 400-800 mm per year; covers the country’s major valleys, which are .. | |||||
Region III | Occupies about 41% of the country. Mean annual rainfall of 1000-1500 mm, growing season of 120-150 d.. | |||||
Region IIa | Mean annual rainfall of 800-1000 mm, a growing season of 100-140 days and a relatively high amount o.. | |||||
Region IIb | Poor soils on the Kalahari sands and the Zambezi floodplain. Mean annual rainfall of 800-1000 mm, g.. |