Peanut

CENTRAL PLATEAUX (PLAINS): Flat to gently undulating.In some areas there are some rocky hill- footslope at medium altitude,developed on granites, sandstone,sheles, quartizites and gneisses. Few flat plains at medium altitude developed mainly on alluvium.Soils are well drained moderately deep to deep, red, yellowish red or orange sands and clay loams to loramy sands with sandy loams in depth. The structure is poor and very low natural fertility. Altitude: 6000-1300 m.a.s.l, Rainfall (mm/year): 800-1400 monomodale. Temperature: 18C-30C

COASTAL PLAINS: Mainly undulating rolling plains of slope range 0-10%. In a few areas there are Strongly dissected uplands and rolling to steep hills, slope range of 10-45% disected. Major soils are well drained, moderately deep to deep, red, yellowish red or orange sands and loamy sands with sandy loams are in the subsoil with poor structure, very low natural fertility. In most cases the soils are moderately well to imperfectely drained, shallow to deep usually calcareous, black, dark grey or brown cracking clays often overlying paler subsoil with ephemeral structure and moderately high natural fertility. However there are few areas with special features: flat, low atitude riverine flood plains and deltas with spatially and temporally varying flooding regime and sedmentation patteins. There covered by young alluvial soils with variaable drainage and flooding conditions. Other special features are those undulating ad rooling plains developed neogenes and quaternary limestone, sandstone, marls, sands and clays. Altitude: 0-500 m.a.s.l ; rainfall (mm/year) 800-1600. Temperatures: 19-30 C.

RUKWA - RUAHA RIFT ZONE - ALLUVIAL FLATS: Flat to undulating plains, covered by riverine or lacustrine alluvium or alluvium fans, levees, piedmonts and by variable flooding conditions. Soil affected by salinity of varying colour, texture, structure, consistence and drainage. Its fertility and moisture storing characteristics adversely affected by presence of exchangeable sodium and soluble salts.In some areas high enough to interfere with growth of most crops.The soils are well drained, moderately deep to deep, reddish and yellowish sandy clay loams and sandy clays. Structure is weak with poor natural fertility. Other areas have poorly drained, deep, dark grey or grey brown often mottled clays.They have higher clay content than the young olluvial clays ( clay 40%-70%) and of also lower natural fertility. Few areas have soils of high natural fertility, imperfectly to poorly drained soils. Altitude: 800-1400 masl. Rainfall (mm/year): 800-2000. Temperature: 18C-30C