Forest soils and land use; proceedings of the fifth North American Forest Soils Conference, Ft. Collins, Colo. (USA), August, 1978

altitud altitude aprovechamiento de la madera azote biologie du sol conservation des sols cycling deslizamiento de tierras erosion forest ecology forest soils geomorfologia geomorphologie geomorphology glissement de terrain land use landslides logging mineral resources nitrogen plant soil relations recursos minerales regeneration relaciones planta suelo relation plante sol soil biology soil conservation suelo forestal utilisation des terres vegetation