Spelling suggestions: "subject:"douglasfir"" "subject:"douglasfirs""
371 |
Nitrogen fixation and cycling in a mixture of young red alder and Douglas-firTang, James Y. 08 October 1997 (has links)
Graduation date: 1998
|
372 |
Deposition of chemicals in semi-porous solids using supercritical fluid carriersSahle-Demessie, Endalkachew 06 May 1994 (has links)
Graduation date: 1994
|
373 |
Effect of thinning and fertilization on wood properties and intra-ring characteristics in young Douglas-fir /Bodner, Josef. January 1983 (has links)
Thesis (M.S.)--Oregon State University, 1984. / Typescript (photocopy). Includes bibliographical references (leaves 104-107). Also available on the World Wide Web.
|
374 |
The role of O-methyltransferase in the lignification of Douglas-Fir cultured tissue.Monroe, Stephen H. 01 January 1983 (has links)
No description available.
|
375 |
A comparison of the B-lectins from Douglas-fir and loblolly pine during growth from seed to saplingBobalek, John Francis 01 January 1982 (has links)
No description available.
|
376 |
The resistance of Douglas-fir to sulfite pulpingHoge, William Henry, January 1954 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1954. / Includes bibliographical references (p. 118-121).
|
377 |
The role of O-methyltransferase in the lignification of Douglas-Fir cultured tissueMonroe, Stephen H. January 1983 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1983. / Includes bibliographical references (p. 113-122).
|
378 |
The sulphite pulping of Douglas firBrookbank, Earl Bruce, January 1938 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1938. / Includes bibliographical references (leaf 94).
|
379 |
The role of methylglyoxal and glyoxalase in the growth and development of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco] needles and needle callusSmits, Michael M., January 1980 (has links) (PDF)
Thesis (Ph. D.)--Institute of Paper Chemistry, 1980. / Bibliography: leaves 100-107.
|
380 |
Role of mycorrhizal networks in dry Douglas-fir forestsTeste, François Philippe 05 1900 (has links)
Mycorrhizal networks (MNs) are fungal hyphae that connect the roots of at least two plants, potentially providing a conduit for interplant resource transfer. Interior Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco) is an obligate ectomycorrhizal (EM) tree species that has high potential to form MNs with neighboring trees because of its receptivity to a diverse community of EM fungi. This MN potential is expected to be greatest among conspecific trees. In this thesis, I determined the influence of MNs formed by residual Douglas-fir trees on interplant carbon transfer and survival, growth, physiology, and EM status of neighboring naturally regenerated and planted Douglas-fir seedlings. To do this, I used MN-restricting treatments and isotope gas-labeling techniques on sites harvested with variable tree retention to investigate how varying: i) proximity to conspecific trees affects EM colonization and performance of planted seedlings; ii) ‘donor’ tree size affects seedling establishment and carbon or nitrogen transfer, and; iii) soil disturbance stress affects net carbon transfer between established seedlings. Because I used physical barriers (i.e., mesh bags) to control for the presence and characteristics of the MN, I also verified the effectiveness of different-sized mesh pores at reducing hyphal connections between plants in the greenhouse. In my experiments, I found that MN-mediated colonization was not the dominant mechanism responsible for EM colonization of planted seedlings; other sources of inoculm (e.g., spores, sclerotia, hyphal fragments) were more important. I found that mature trees not only competed for resources with seedlings but offered some facilitative effects at intermediate distances within their rooting zones. My key finding was that access to a MN with residual trees benefited seedling survival and that this corresponded with increased carbon and nitrogen transfer to seedlings. In addition, I found that there was consistently a net gain in carbon by one seedling in a MN and this net transfer increased with relative growth rate of the receiver seedling. These results indicate that MNs can facilitate interplant carbon transfer and be important in regeneration dynamics in dry Douglas-fir forests.
|
Page generated in 0.0353 seconds