Response of Seeded Ranges to Different Grazing Intensities in the Ponderosa Pine Zone of Colorado
Author : Pat O. Currie
Publisher :
Page : 52 pages
File Size : 27,66 MB
Release : 1970
Category : Grazing
ISBN :
Author : Pat O. Currie
Publisher :
Page : 52 pages
File Size : 27,66 MB
Release : 1970
Category : Grazing
ISBN :
Author :
Publisher :
Page : 140 pages
File Size : 25,35 MB
Release : 2007-09
Category :
ISBN :
Backpacker brings the outdoors straight to the reader's doorstep, inspiring and enabling them to go more places and enjoy nature more often. The authority on active adventure, Backpacker is the world's first GPS-enabled magazine, and the only magazine whose editors personally test the hiking trails, camping gear, and survival tips they publish. Backpacker's Editors' Choice Awards, an industry honor recognizing design, feature and product innovation, has become the gold standard against which all other outdoor-industry awards are measured.
Author : Charles J. Krebs
Publisher : Benjamin-Cummings Publishing Company
Page : 695 pages
File Size : 11,39 MB
Release : 2001
Category : Science
ISBN : 9780321068798
This best-selling majors ecology book continues to present ecology as a series of problems for readers to critically analyze. No other text presents analytical, quantitative, and statistical ecological information in an equally accessible style. Reflecting the way ecologists actually practice, the book emphasizes the role of experiments in testing ecological ideas and discusses many contemporary and controversial problems related to distribution and abundance. Throughout the book, Krebs thoroughly explains the application of mathematical concepts in ecology while reinforcing these concepts with research references, examples, and interesting end-of-chapter review questions. Thoroughly updated with new examples and references, the book now features a new full-color design and is accompanied by an art CD-ROM for instructors. The field package also includes The Ecology Action Guide, a guide that encourages readers to be environmentally responsible citizens, and a subscription to The Ecology Place (www.ecologyplace.com), a web site and CD-ROM that enables users to become virtual field ecologists by performing experiments such as estimating the number of mice on an imaginary island or restoring prairie land in Iowa. For college instructors and students.
Author : Brain F. Chabot
Publisher : Springer Science & Business Media
Page : 704 pages
File Size : 47,45 MB
Release : 2012-12-06
Category : Science
ISBN : 9400948301
Although, as W.D. Billings notes in his chapter in this book. the development of physiological ecology can be traced back to the very beginnings of the study of ecology it is clear that the modern development of this field in North America is due in the large part to the efforts of Billings alone. The foundation that Billings laid in the late 1950s came from his own studies on deserts and subsequently arctic and alpine plants, and also from his enormous success in instilling enthusiasm for the field in the numerous students attracted to the plant ecology program at Duke University. Billings' own studies provided the model for subsequent work in this field. Physiological techniques. normally confined to the laboratory. were brought into the field to examine processes under natural environmental conditions. These field studies were accompanied by experiments under controlled conditions where the relative impact of various factors could be assessed and further where genetic as opposed to environmental influences could be separated. This blending of field and laboratory approaches promoted the design of experiments which were of direct relevance to understanding the distribution and abundance of plants in nature. Physiological mechanisms were studied and assessed in the context of the functioning of plants under natural conditions rather than as an end in itself.
Author : Chris Maser
Publisher :
Page : 820 pages
File Size : 44,71 MB
Release : 1983
Category : Range management
ISBN :
Author :
Publisher :
Page : 306 pages
File Size : 10,57 MB
Release : 1998
Category : Cumulative effects assessment (Environmental assessment)
ISBN :
Author : Dwight R. Smith
Publisher :
Page : 68 pages
File Size : 41,65 MB
Release : 1967
Category : Agriculture
ISBN :
Author :
Publisher :
Page : 22 pages
File Size : 43,9 MB
Release : 1888
Category : Agricultural experiment stations
ISBN :
Author :
Publisher :
Page : 208 pages
File Size : 30,9 MB
Release : 1988
Category : Forests and forestry
ISBN :
Author : Wallace M. Johnson
Publisher :
Page : 36 pages
File Size : 17,61 MB
Release : 1953
Category : Grazing
ISBN :