The availability and applicability of draught-animal and mechanical work in Brazilian agriculture

animal de trait animales de tiro brasil brazil costos costs crops cultivation cultivation equipment cultivo cultivos demand demanda demande draught animals exploitation agricole explotaciones agrarias farm inputs farm size farms insumos agricolas main d'oeuvre mano de obra manpower maquinaria de cultivo moyen de production agricole plante de culture pratique culturale taille de l'exploitation agricole