• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1603
  • 253
  • 217
  • 142
  • 138
  • 60
  • 53
  • 51
  • 28
  • 23
  • 23
  • 23
  • 23
  • 23
  • 22
  • Tagged with
  • 3217
  • 891
  • 857
  • 487
  • 485
  • 406
  • 384
  • 359
  • 355
  • 278
  • 252
  • 215
  • 212
  • 171
  • 166
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
61

Technological innovation in forest harvesting /

Mannikko, Nancy Farm, January 1990 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Includes bibliographical references (leaves 97-104). Also available via the Internet.
62

Ordination and classification of Swiss and Canadian coniferous forests by various biometric and other methods

Groenewoud, Herman van, January 1965 (has links)
Thesis (doctoral)--Eidgenössischen Technischen Hochschule in Zürich, 1965. / Reprint of Ber. geobot. Inst. ETH, Stiftg. Rübel, Zürich 36, 28-102 (1965). Abstract also in German. Cover title. Includes bibliographical references (p. 92-94).
63

Ordination and classification of Swiss and Canadian coniferous forests by various biometric and other methods

Groenewoud, Herman van, January 1965 (has links)
Thesis (doctoral)--Eidgenössischen Technischen Hochschule in Zürich, 1965. / Reprint of Ber. geobot. Inst. ETH, Stiftg. Rübel, Zürich 36, 28-102 (1965). Abstract also in German. Cover title. Includes bibliographical references (p. 92-94).
64

Urban forestry in China : a biogeographical study in Guangzhou city /

Liu, Hung-to. January 1998 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1999. / Includes bibliographical references (leaves 277-296).
65

Demand for urban forests a national and regional study /

Zhu, Pengyu, Zhang, Yaoqi. January 2006 (has links)
Thesis--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references (p.39-44).
66

Generation of an animation interface for ORGANON /

Hanus, Mark L. January 1995 (has links)
Thesis (M.S.)--Oregon State University, 1995. / Typescript (photocopy). Includes bibliographical references. Also available on the World Wide Web.
67

Understanding the present and historic forest resource use of the Ntabamhlope indigenous state forest by rural communities /

Mthimkhulu, Oscar. January 2009 (has links)
Thesis (M.Env.Dev.) - University of KwaZulu-Natal, Pietermaritzburg, 2009. / Full text also available online. Scroll down for electronic link.
68

Environmental factors and management option for prosopis invasive species: A case study in Botswana's Kgalagadi Distict / Samuel Mosweu

Mosweu, Samuel January 2012 (has links)
Thesis (Ph.D.(Environmental Science) North-West University, Mafikeng Campus, 2012
69

Fire moss as a tool for post-wildfire ecosystem restoration

Ives, Christopher M. 26 August 2016 (has links)
<p> Increasingly large and severe fires across the western United States are creating difficult challenges for land managers. Despite the wide usage of current post-fire hillslope treatments, their effectiveness varies. Some research even shows negative impacts, such as the spread of invasive species. </p><p> The use of select post-fire colonizing mosses or &ldquo;fire moss&rdquo; is a promising post-fire stabilization treatment and longer-term restoration tool that has never been investigated for use in high severity burned environments. Fire mosses possess traits that make them ideal candidates for restoration purposes such as: universal distribution, desiccation tolerance, high water holding capacity, and soil aggregation ability. Fire mosses also are apparently succeeded by vascular plants. Harnessing the restoration power of fire mosses, finding ways to bring them to additional critical post-fire sites, and hastening their arrival on scene could provide a valuable service not currently being utilized. Our research addresses the basic questions surrounding the effectiveness of fire mosses in post-fire stabilization and restoration since there is no know prior work in this field. Field experiments were conducted to determine if fire moss could be grown on post-fire sites. Results show that inoculation increased moss growth by nine times and moss cover was an order of magnitude greater on high severity burned plots than either moderate or unburned plots. Subsequently, greenhouse experiments were conducted to find optimal growth conditions under which an inoculum supply source could be grown for field application. Results show that greatest moss growth occurred under five and seven day per week watering schedules, with fire moss Bryum argenteum constituting a majority of overall moss growth in the less frequent watering schedules suggesting that this moss would be the best candidate for use in marginal fire moss habitat (lower elevation, drier, and more exposed sites). Additionally, mosses Funaria hygrometrica and Ceratodon purpureus grew more prolifically in sample units with ash, while the opposite was true for Bryum argenteum, suggesting that future research should be conducted on the underlying mechanism. Overall, fire moss showed promise as a plausible restoration material, leading us toward future research given its potential to avoid problems caused by other hillslope treatments.</p>
70

Nonindustrial forests, public policy and long-term timber supply in the South /

Brooks, David J. January 1983 (has links)
Thesis (Ph. D.)--Oregon State University, 1984. / Typescript (photocopy). Includes bibliographical references (leaves 100-104). Also available on the World Wide Web.

Page generated in 0.0726 seconds