The ratio between base cations and aluminium in soil solution as a criterion for critical load in forest soil

aluminio aluminium calcio calcium cation cationes cations deterioro del suelo forest ecology forest pathology forest soils growth rate noruega norway nutrient solutions ph del suelo ph du sol plant soil relations relaciones planta suelo relation plante sol soil deterioration soil ph soil solution soluciones del suelo soluciones nutritivas solution du sol solution nutritive suelo forestal taux de croissance