Download or read book Repeated Manual Release in a Young Plantation written by Philip M. McDonald and published by . This book was released on 1994 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Douglas-fir seedlings on the Arcata Resource Area, Bureau of Land Management, U.S. Department of the Interior, in central coastal California, were released by chain sawing and grubbing competing vegetation around them at different frequencies (0, 2, and 3 grubbings) over a 5-year period. After 5 years, average Douglas-fir stem diameter (measured at 12 inches above mean groundline) of seedlings grubbed at ages 1,2, and 5 was 0.91 inches, and of seedlings grubbed after the first and fifth growing season was 0.95 inches. Both were significantly larger than counterparts in the control (0.57 inches). Tanoak, the most competitive species, constituted 84 percent of total plant cover in the control after 5 years, but only 25 percent on treated plots. Combined shrubs varied little between the untreated control and treated plots and averaged about 7 percent of total foliar cover. Grasses were not present in the control and only for the fifth year in treated plots. The most abundant forb, a hedge nettle, increased greatly in density in both control and treated plots. These relationships and others denoted in the paper yield valuable ecological information on species and community dynamics in both a natural and treated environment. Crew time (no overhead or travel costs) for the three grubbings was 52 hours and for the two grubbings was 44 hours.
Download or read book Repeated Manual Release in a Young Plantation written by Philip M. McDonald and published by . This book was released on 1994 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vegetation Trends in a Young Ponderosa Pine Plantation Treated by Manual Release and Mulching written by Philip M. McDonald and published by . This book was released on 1997 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Visitor Perceptions of Crowding and Discrimination at Two National Forests in Southern California written by Deborah J. Chavez and published by . This book was released on 1993 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology and Development of Douglas fir Seedlings and Associated Plant Species in a Coast Range Plantation written by Philip M. McDonald and published by . This book was released on 1999 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vegetation Trends in a 31 year old Ponderosa Pine Plantation written by Philip M. McDonald and published by . This book was released on 1997 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forestry Research West written by and published by . This book was released on 1993 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Paper PNW written by and published by . This book was released on 1978 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Abstracts written by and published by . This book was released on 1995-05 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Mixed Shrub tanoak Douglas fir Community in a Treated and Untreated Condition written by Philip M. McDonald and published by . This book was released on 1996 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Publications Quarterly List written by and published by . This book was released on 1994 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1975 with total page 2834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Method for Assessing the Silvicultural Effects of Releasing Young Trees from Competition written by Peyton W. Owston and published by . This book was released on 1986 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Een methode wordt beschreven, waarin men de toestandsverandering in groei en overleving van bomen beschrijft van zowel een getraceerd gebied waar geen beheersmaatregelen worden toegepast, als van een controle-gebied waar wel beheer wordt gevoerd
Download or read book A Manual of Plain Directions for Planting and Cultivating Vineyards and for Making Wine in New South Wales written by James Busby and published by . This book was released on 1830 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Agriculturist s Manual Forming a Report of Lawson s Agricultural Museum in Edinburgh written by Lawson, Peter and Son and published by . This book was released on 1836 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Agriculturist s Manual Being a Familiar Description of the Agricultural Plants Cultivated in Europe written by Peter Lawson & Son and published by . This book was released on 1836 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Agriculturist s Manual Being a Description of the Agricultural Plants Cultivated in Europe Including Practical Observations Respecting Those Suited to the Climate of Great Britain and Forming a Report of Lawson s Agricultural Museum in Edinburgh By P Lawson and Son written by Peter LAWSON (AND SON.) and published by . This book was released on 1836 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
