Realistic Planning for Arid Lands: Natural Resource Limitations to Agricultural Development

activities Africa agri agricultural development agricultural policy agricultural production systems Agricultural Technology animals appropriate technology arid and semiarid arid lands agricultural arid lands countries arid lands development arid regions benefits capital carrying capacity climatic zone constraints consumption costs crop production cultivation desert Desertification developing arid lands developing countries drought duction dust bowl economic effective erosion evaluation export factors farmers farming fertilizer food production fossil fuel grazing groundwater hectare herders human implementation important improved increased infrastructure inputs irrigation ISYALAPS planning framework labor land degradation land element Latin America limited livestock livestock production long-term ment Middle East natural resources nomads numbers percent planners planning area plants population potential problems programs projects rainfall reduced RESOURCE countries result Sahel season sector semiarid social sources storage strategy supply Table technology levels terajoules tion University of Arizona urban utilization World Food Zambia