[Preliminary report volume IV : availability of soils, forest stands and environment in Rwanda]

agricultural policies ambiente rural arachide arroz batata bogs cacahuete cassava cultivo mixto demografia demographie demography desarrollo regional eleusine environnement rural exploitation agricole familiale family farms groundnuts guisante habitat rural haricot commun igname kidney beans mais maize mandioca manioc marais mixed cropping names papa patate douce peas pois politique agricole pomme de terre population change potatoes regional development rice riz rural environment rural housing soja sorgho sorghum grain soybeans sweet potatoes taro tenencia tenure tremedal trigo triticale vivienda rural wheats yams