outillage agricole pour les régions arides et tropicales

animal de travail animales de trabajo aradura arid zones arneses battage boeuf buey bullocks caballos cheval cosecha dust equipment equipo hand tools handling machinery harnachement harness harrows harvesting herse horses labour maquinaria de labranza outillage manuel plantation planting planting equipment ploughing polvo (contaminantes) pulverizadores rastra separating separation site preparation sprayers threshing tillage equipment transport transporte trilla utillaje manual weeding working animals workshops zone aride