[Improve of fruit production with preservation of natural environment friendly to the human being]

abricot albaricoque apples apricots arbre fruitier black currants cassis cereza cerise cherries crecimiento croissance crop yield cultivation cultivo disease resistance durazno environmental protection fragaria fraise fresa fruit crops fruit trees frutales grafting greffage grosella negra growth injerto malus manzana peaches poda pomme portainjertos porte greffe pratique culturale protection de l'environnement pruning prunus pyrus rendement des cultures rendimiento de cultivos resistencia a la enfermedad ribes nigrum rootstocks strawberries taille