Quantitative characterization of nutrient regimes in some boreal forest soils

acidez acidity analyse de sol azote boreal forests british columbia carbon carbone carbono classification des sols colombie britannique correlation disponibilidad de nutrientes fertilidad del suelo forest litter forest soils hojarasca forestal mineral soils mineralisation mineralization nitrogen nitrogen content nutrient availability nutritive value site factors soil analysis soil chemicophysical properties soil classification soil fertility soil testing suelo forestal suelo mineral teneur en azote valeur nutritive valor nutritivo