Soil Mg/Ca ratio in relation to the availability of phosphorus and its translocation in plant

abonos fosfatados crops cultivos disponibilidad de nutrientes disponibilité d'élément nutritif engrais phosphaté fertilidad del suelo fertilité du sol nutrient availability nutrient transport phosphate fertilizers plant soil relations plante de culture pollution polución relaciones planta suelo relation plante sol salinidad salinity salinité soil fertility soil types tipos de suelos transport des substances nutritives transporte de nutrientes type de sol