[New developments in the US American egg and pig production: Sectoral and regional dynamics in the US-American pig production]

agricultural censuses carne de cerdo censos agrarios cerdas cerdo engorde engraissement eua exportaciones exportation exports farm structure fattening forecasting meat production mercados mundiales porcin pork production data production de viande production structure recensement agricole sows structure d'exploitation agricole structure de production swine truie usa viande porcine world markets