Zobrazeno 1 - 10
of 12
pro vyhledávání: '"H. N. Chappell"'
Autor:
J. L. Rakestraw, H. W. Duzan, B. H. Cazell, J. R. Johnson, H. N. Chappell, M. A. Jacobson, E. D. Vance
Publikováno v:
Southern Journal of Applied Forestry. 34:38-45
The southern forest sector has undergone dramatic changes over the past decade, including shifts in land ownership (from integrated forest product companies to organizations with different objectives and time horizons) and losses of forestland to dev
Publikováno v:
Canadian Journal of Forest Research. 31:2225-2236
Chemical and microbial soil properties were assessed in paired unfertilized and urea fertilized (>89 g N·m2) plots in 13 second-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands distributed throughout western Washington and Oregon.
Publikováno v:
University of Copenhagen
Scopus-Elsevier
Scopus-Elsevier
Nitrogen cycling is generally considered to be more rapid on sites with high availability of N; this is usually associated with differences in tree species composition. We tested whether N cycling in stands of a single tree species increased with inc
Publikováno v:
Soil Science Society of America Journal. 63:1448-1454
years after a single N application of 470 kg ha 2 1 to a Douglas-fir stand in southeastern Washington (Binkley It has been suggested that a long-term increase in N availability and Reid, 1985; Strader and Binkley, 1989). Prescott et could be achieved
Publikováno v:
Soil Science Society of America Journal. 59:1468-1475
Soil organic C content (SOC, kilograms C per square meter) and its relation to site characteristics are important in evaluating current regional, continental, and global soil C stores and projecting future changes. Data were compiled for 499 pedons i
Autor:
J.S. Shumway, H. N. Chappell
Publikováno v:
Canadian Journal of Forest Research. 25:208-214
Le systeme de diagnostic et de recommandation DRIS (diagnosis and recommendation integrated system) a ete utilise avec succes pour les cultures en milieu agricole et semble prometteur pour son utilisation dans les peuplements forestiers. La presente
Autor:
W. S. Bennett, H. N. Chappell
Publikováno v:
Soil Science Society of America Journal. 57:834-838
Effects of fertilization and thinning on 8-year growth responses of second-growth Douglas-fir stands
Autor:
H. N. Chappell, K. A. Stegemoeller
Publikováno v:
Canadian Journal of Forest Research. 21:516-521
Fertilization of Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) stands generally increased both basal area and volume growth for at least 8 years. Thinning tended to have an even greater effect than fertilization on basal area and volume growth, i
Publikováno v:
Fertilizer Research. 27:129-140
Forest managers in the Pacific Northwest (PNW) use fertilization as a means to increase timber yields in managed stands. Information on the biological basis for nutrient amendments and stand growth responses to fertilization is required to effectivel
Publikováno v:
Soil Science Society of America Journal. 54:257-262