[Results of an 8 year experiment in apple plantations to suppress weeds with non-composted materials]

abies apples application rates bark calidad cobertura verde colza corteza dose d'application escarda essai fertilidad del suelo feuille herbicidas herbicide herbicides hojas huerto frutal leaves live mulches malezas manzana mauvaise herbe mulch vivant orchards paille paja ph pomme pruebas quality rape soil fertility straw trials verger weed control weeds