The effect of mineral fertilization and spacing on some components of the phenotypic structure of potato tuber production

absorption de substances nutritives analyse statistique application rates crop yield dose d'application engrais npk fertilisation fertilizantes npk fertilizer application metabolismo de minerales mineral metabolism npk fertilizers nutrient uptake periodo vegetativo peso poids rendement des cultures rendimiento de cultivos solanum tuberosum statistical analysis stems tallo tige tubercule tubers variedades varieties vegetative period weight