Author: Rollin D. SalisburyPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 864
Book Description
Physiography
Author: Rollin D. SalisburyPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 864
Book Description
Relation of Canyon Physiography to the Incidence of Blister Rust in the Central Sierra Nevada
Author: Clarence R. QuickPublisher:
ISBN:
Category : Blister rust
Languages : en
Pages : 20
Book Description
White pine blister rust is widespread and abundant on sugar pine in northwest California. In the central Sierra Nevada, it tends to occur in "pockets" in canyons and stream basins. Records of infection near the southerly limit of the disease were scrutinized. Data from 14 areas were studied statistically. Eight physiographic factors were computed for each rust center. Canyon physiography and intensity of rust were markedly correlated. A records approach to prediction of future rust incidence in the central Sierra Nevada could be useful in planning control work.
Selected Aspects of Geology and Physiography of the Cold Regions
Author: S. Russell StearnsPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 40
Book Description
The purpose of this work is to provide those contemplating scientific or engineering activities in cold regions with a general picture of their geology and physiography. The cold regions are the Arctic, Alaska, Canadian Arctic and subarctic, Greenland, Iceland, Jan Mayen Svalbard, Scandinavia, U.S.S.R., and the Antarctica.
Taconic Physiography
Author: Thomas Nelson DalePublisher:
ISBN:
Category : Geology
Languages : en
Pages : 84
Book Description
The Physiography of the United States
Author: National Geographic Society (U.S.)Publisher:
ISBN:
Category : Physical geography
Languages : en
Pages : 366
Book Description
Physiographic processes, by J.W. Powell.--Physiographic features, by J.W. Powell.--Physiographic regions of the United States, by J.W. Powell.--Present and extinct lakes of Nevada, by I.C. Russell.--Beaches and tidal marshes of the Atlantic coast, by N.S. Shaler.--The Northern Appalachians, by B. Willis.--Niagara Falls and their history, by G.K. Gilbert.--Mount Shasta, a typical volcano, by J.S. Diller.--The physical geography of southern New England, by W.M. Davis.--The southern Appalachians, by C.W. Hayes.
Notes on the Natural History and Physiography of New Brunswick
Author: William Francis GanongPublisher:
ISBN:
Category :
Languages : en
Pages : 562
Book Description
Regional Topography, Physiography, and Geology of the Northern Great Plains
Author: William R. KeeferPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 60
Book Description
The Physiography of the Southern Santa Cruz Mountains
Author: Robin WillisPhysiography and Quaternary Geology of the San Juan Mountains, Colorado
Author: Wallace Walter AtwoodPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 222
Book Description
The Vegetation and Physiography of Sumatra
Author: Yves LaumonierPublisher: Springer Science & Business Media
ISBN: 9400900317
Category : Science
Languages : en
Pages : 234
Book Description
Fifteen years ago, approximately half the world population was estimated to live in continental and insular South-East Asia (Burma, Thailand, Kampuchea, Vietnam, Laos, Indonesia, Philippines). Then the region had a population growth of four million people every month, and the problem of malnutrition was acute for the rural population. International agricultural development organisations decided that their primary aim would be to double existing levels of agricultural production and, taking account of population growth, to double it again by the end of the century (Whyte 1976). Today, while global issues have greatly affected the parameters of the problem, the situation remains both serious and difficult. Despite impressive efforts in education and health, Indonesia for example, where population (179 millions) growth eased off only slightly between 1980 and 1990 (from 2. 3 percent to 1. 9 percent), is having to cope with increasing difficulties in managing natural resources and particularly its evanescent forest assets which, until 1986, were the second largest source of national revenue. Indonesia has the second largest surface area of tropical rain forests in the world (after Brazil) and thus all the problems linked with management and disappearance of those forests. The latest estimate gives a figure of 109 million hectares of forest in 1990, of which 40. 8 million hectares are production forests (Anon. -F AO 1990).