Pseudotsuga menziesii Pseudotsuga 6 Coniferophyta 4 Pinus ponderosa 4 coniferous forest 4 Austrocedrus chilensis 3 Abies 2 Alnus Rubra 2 Alnus rubra 2 Betulaceae 2 Bos 2 Cascade Head Experimental Forest 2 Cascade Mountains 2 Ciencias Agrarias y Forestales 2 Coniferous forest 2 Cupressus 2 Cypress forests 2 Douglas fir 2 Hardwoods 2 Invasions 2 Lodgepole pine 2 Mixed plantings 2 North America 2 Pacific Northwest 2 Patagonia 2 Pinus contorta 2 Planting 2 Ponderosa pine 2 Rhizosphere 2 Roots 2