Soil compaction after yarding of small-diameter Douglas-Fir with a small tractor in southwest Oregon [microform] / Michael P. Amaranthus and David E. Steinfeld (Research paper PNW ; RP-504)
Soil compaction after yarding of small-diameter Douglas-Fir with a small tractor in southwest Oregon [microform] / Michael P. Amaranthus and David E. Steinfeld