The Improvement of Tropical and Subtropical Rangelands

Acacia adapted Africa agricultural ahmia Aït animals areas arid Bakhtiari Basseri burning camels camp cattle climate costs crop degradation desertification drought ecological economic ecosystem environment environmental erosion evaluation example factors Faidherbia albida fodder forage forest Fredrik Barth fuelwood goats grain grasses grazing groups growth Haviks hectares hema herds Houérou iklan important increase Kenya land legume livestock maps Mauritania McKell meat Middle Atlas migration milk moisture Moulouya mountain movement National Research Council nomadic nutrient overgrazing pastoralists pastures pattern percent plant species population potential precipitation production rainfall ranch range improvement Range Management rangelands reduced region Reguibat resource assessment result revegetation Sahel Sakuye seed seedlings semiarid sheep shrubs slopes social soil stocking rates Tamasheq temperature tents tion traditional transhumance trees tribal tribes tropical and subtropical types U.S. Department unit valleys vegetation village Wadi wildlife winter Zard Kuh zone