Analysis of the nutritive value of timothy grown with varying N nutrition

abonos abonos nitrogenados azote biomasa biomass biomasse cell walls contenido de materia seca deficiencia de minerales dry matter content engrais etapas de desarrollo de la planta fertilizers feuille hojas leaves mineral deficiencies nitrogen nitrogen fertilizers nutritive value pared celular paroi cellulaire phleum pratense plant developmental stages rebrote regrowth repousse stems tallo tige valeur nutritive valor nutritivo