Report on the 1950 world census of agriculture - Vol 2, census methodology

abonos agricultural censuses agricultural structure aves de corral censos censos agrarios censuses crops cultivos drainage drenaje engrais fertilizers fishery products ganado human population irrigation labour land use livestock methode methods monde mundo plante de culture population humaine poultry productos de la madera productos pesqueros recensement recensement agricole reclamation riego structure agricole technologie technology tecnologia tenencia tenure trabajo travail utilisation des terres volaille wood products world