Effect of nitrogenous fertilizers on the growth and yield of mulberry

abonos nitrogenados abonos npk ammonitrate application rates calcium ammonium nitrate crecimiento croissance crop yield dose d'application engrais npk fertilisation fertilizer application feuille growth hojas leaves morus alba nitrogen fertilizers npk fertilizers rendement des cultures rendimiento de cultivos sericicultura sericulture urea uree