Influence of a differentiated system of cultural practises upon yield and quality of apples grown in intensive apple orchards

abonos verdes agriculture intensive agronomia agronomie agronomy analyse statistique apples cambisol cambisoles cambisols crop yield cubrimiento del suelo engrais vert fallow systems gramineas graminee grasses green manures huerto frutal intensive farming irrigation malus manzana mulching orchard soils orchards paillage pomme rendement des cultures rendimiento de cultivos riego sistemas con barbecho sol de verger statistical analysis suelo de huertos variedades varieties verger