These countries coincide closely with semi-arid and dry sub-humid hydroclimates, savannahs and steppe ecosystems, where rainfed agriculture is the dominating source of food, and where water constitutes a key limiting factor to crop growth.
Matatizo makubwa yanayokabili Kilimo nchini Tanzania ni upungufu wa nguvu kazi na uzalishaji kutokana na uhaba wa nyenzo za kisasa za ukulima pamoja na kutegemea sana hali ya hewa ambayo haiaminiki.