[Agricultural survey in Bururi province [Burundi]]

animal production burundi cash crops colocase cultivos alimenticios cultivos comerciales culture de rapport encuestas sobre explotaciones fallow systems farm structure farm surveys food crops grazing haricot hogares households human population land use manioc pastoreo patate douce plant production plante alimentaire population humaine production animale sistemas con barbecho structure d'exploitation agricole utilisation des terres