Nitrogen, Corn, and Forest Genetics. The Agricultural Yield Strategy-Implications for Douglas-Fir Management

摘要

Agricultural yield strategy simply aims to increase number of grain bearing stalks per acre. Forestry strategies look to thinning fertilizer, and genetics, each to provide gains. The agricultural strategies applied to Douglas-fir appear to be impractical for long rotations. Concern is expressed for commitments to perpetual inputs of material and energy to keep a yield above the land's carrying capacity. Adapted natural populations are the major resource in keeping a yield improvement strategy trouble-free.