The effect of soil cultivation to spring barley on the content and uptake of nutrients

absorption de substances nutritives azote calcio calcium cero-labranza chemical composition composition chimique cultivos de primavera culture de printemps essai etapas de desarrollo de la planta fosforo hordeum vulgare labranza magnesio magnesium nitrogen nutrient uptake nutritive value phosphore phosphorus plant developmental stages potasio potassium pruebas spring crops tillage travail du sol trials valeur nutritive valor nutritivo zero tillage