Energy effectiveness of mineral nutrition during the production process of winter wheat

analyse input output analyse statistique biomasa biomass biomasse condiciones ambientales condition de milieu costos costs crecimiento croissance crop yield cultivos de invierno culture d'hiver engrais npk environmental conditions essai fertilizantes npk feuille grain granos growth hojas input output analysis leaves measurement mesure minerales minerals npk fertilizers peso poids pruebas rendement des cultures rendimiento de cultivos statistical analysis trials triticum weight winter crops