A study on the barley crop production function and the substitution relationships for resources use, in Kwangju, Korea.

abonos affectation de ressources analyse input output analyse statistique application rates azote compost composts demand demanda demande economic analysis engrais fertilizers fonction de production hordeum vulgare input output analysis korea republic nitrogen oferta offre production functions rendement rendimiento resource allocation resource substitution statistical analysis substitution des ressources supply yields