The effect of the fertilizing system based on the principle of cation exchange capacity on the content of mineral substances in orchard grass

absorption de substances nutritives analyse de sol application rates besoin nutritionnel calcio calcium cation cationes cations chemical composition composition chimique contenido de materia seca contenido mineral crop yield dactylis glomerata dose d'application dry matter content fertilisation fertilizer application ion exchange capacity magnesio magnesium mineral content necesidades de nutrientes nutrient uptake nutritional requirements potasio potassium rendement des cultures rendimiento de cultivos sodio sodium soil testing