Response of aboveground biomass increment, growth efficiency, and foliar nutrients to thinning, fertilization, and pruning in young Douglas-fir plantations in the central Oregon Cascades. Velazquez-Martinez, A., Perry, D. A., & Bell, T. E. Canadian Journal of Forest Research, 1992.
Response of aboveground biomass increment, growth efficiency, and foliar nutrients to thinning, fertilization, and pruning in young Douglas-fir plantations in the central Oregon Cascades [pdf]Paper  bibtex   

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