Wheat

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

EASTERN PLATEAUX AND MOUNTAIN BLOCKS: Mainly well drained, undulating to rolling plains and plateaux developed on gneissic rocks. A few well drained, undulating to rolling plains at lower atitude(150-500mm) developed on intermediate metamovic rocks. However, there are some poorly drain flat wide topographic deprations developed on young aluvial and strongly dissected upland and low hills transitional to mountain. sloppy areas are strongly dissected, often rocky and severely eroded. Dominant soils are well drained moderately deep to deep, dark redish brown, yellowish red or red sandy clay loams and sany clays. Their structures is weak or moderately with low natural fertility. Their moderaly well imperfectly drained, deep, brown, pale yellow, light gre or white mottled sands and loamy sands with poor structure with very low natural fertility. Altitude: 200-1500 masl. Few areas up 2,000 masl. Temperature: 15-31 C. Rainfall (mm/year): 400-2000.

HIGH PLAINS AND PLATEAUX: Mainly flat and undulating to rolling plains and plateaux at high altitude, developed on granites and gneisses. In other areas there are strongly dissected hills,mountaineous topograph, volicanic land forms at high altitudes. Mojor soils are well drained deep brown, yellowish, sand loam, sand clays to clay with moderately to strong structure. The soils have moderately to high natural fetility. Altitude: 500-2400 masl. Rainfall (mm/year): 600-2400. Temperature: 19-25 C.

VOLCANOES AND RIFT DEPRESSIONS : Mainly rolling to hilly, dissected plateaux at high altitude developed on volcanic ash, lavas and on gneisses. In some areas there are volcanic mountain with gental to steep ash and lava slopes streching from medium(600-1600masl) to high altitude (2300 masl). At medium altitude on encounters locostrarine plains, extensive salt and soda flats. The soils are well drained, in some areas heterogenous soils types with propotion of fertile, deep yellowish, redish sand clay to moderate to strong structure. In some areas of the zone the soils are of varying coulor, texture and structure consistence and drainage. Their fertility stutus and moisture storage proparties are advesily affected by presence of exchangeble sodium salt or soluble salts at level that are high enough to enterfere with growth of most crops. Altitude: 900-2400 masl. Rainfall (mm/year): 400-1600. Temperature: 22C-30C