Agrindex PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Agrindex PDF full book. Access full book title Agrindex by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 820
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 820
Get Book Here
Book Description
Author: Nevada State Library
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 174
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 612
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 782
Get Book Here
Book Description
Author: William Joe Simonds
Publisher:
ISBN:
Category : Carson River (Nev.)
Languages : en
Pages : 60
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 820
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 574
Get Book Here
Book Description
Author: Roberto RodrÃguez
Publisher: Springer Science & Business Media
ISBN: 1468457608
Category : Science
Languages : en
Pages : 425
Get Book Here
Book Description
For many, the terms aging, maturation and senescence are synonymous and used interchangeably, but they should not be. Whereas senescence represents an endogenously controlled degenerative programme leading to plant or organ death, genetiC aging encompasses a wide array of passive degenerative genetiC processes driven primarily by exogenous factors (Leopold, 1975). Aging is therefore considered a consequence of genetiC lesions that accumulate over time, but by themselves do not necessarily cause death. These lesions are probably made more severe by the increase in size and complexity in trees and their attendant physiology. Thus while the withering of flower petals following pollination can be considered senescence, the loss of viability of stored seeds more clearly represents aging (Norden, 1988). The very recent book "Senescence and Aging in Plants" does not discuss trees, the most dominant group of plants on the earth. Yet both angiospermic and gymnospermic trees also undergo the above phenomena but less is known about them. Do woody plants senesce or do they just age? What is phase change? Is this synonymous with maturation? While it is now becoming recognized that there is no programmed senescence in trees, senescence of their parts, even in gymnosperms (e. g. , needles of temperate conifers las t an average of 3. 5 years), is common; but aging is a readily acknowledged phenomenon. In theory, at least, in the absence of any programmed senescence trees should -live forever, but in practice they do not.
Author: Congressional Research Congressional Research Service
Publisher: CreateSpace
ISBN: 9781505875508
Category :
Languages : en
Pages : 28
Get Book Here
Book Description
The federal government owns roughly 640 million acres, about 28% of the 2.27 billion acres of land in the United States. Four agencies administer 608.9 million acres of this land: the Bureau of Land Management (BLM), Fish and Wildlife Service (FWS), and National Park Service (NPS) in the Department of the Interior (DOI), and the Forest Service (FS) in the Department of Agriculture. Most of these lands are in the West and Alaska. In addition, the Department of Defense administers 14.4 million acres in the United States consisting of military bases, training ranges, and more. Numerous other agencies administer the remaining federal acreage. The lands administered by the four land agencies are managed for many purposes, primarily related to preservation, recreation, and development of natural resources. Yet each of these agencies has distinct responsibilities. The BLM manages 247.3 million acres of public land and administers about 700 million acres of federal subsurface mineral estate throughout the nation. The BLM has a multiple-use, sustained-yield mandate that supports a variety of uses and programs, including energy development, recreation, grazing, wild horses and burros, and conservation. The FS manages 192.9 million acres also for multiple uses and sustained yields of various products and services, including timber harvesting, recreation, grazing, watershed protection, and fish and wildlife habitats. Most of the FS lands are designated national forests. Wildfire protection is increasingly important for both agencies. The FWS manages 89.1 million acres of the total, primarily to conserve and protect animals and plants. The National Wildlife Refuge System includes wildlife refuges, waterfowl production areas, and wildlife coordination units. The NPS manages 79.6 million acres in 401 diverse units to conserve lands and resources and make them available for public use. Activities that harvest or remove resources generally are prohibited. Federal land ownership is concentrated in the West. Specifically, 61.2% of Alaska is federally owned, as is 46.9% of the 11 coterminous western states. By contrast, the federal government owns 4.0% of lands in the other states. This western concentration has contributed to a higher degree of controversy over land ownership and use in that part of the country. Throughout America's history, federal land laws have reflected two visions: keeping some lands in federal ownership while disposing of others. From the earliest days, there has been conflict between these two visions. During the 19th century, many laws encouraged settlement of the West through federal land disposal. Mostly in the 20th century, emphasis shifted to retention of federal lands. Congress has provided varying land acquisition and disposal authorities to the agencies, ranging from restricted to broad. As a result of acquisitions and disposals, federal land ownership by the five agencies has declined by 23.5 million acres since 1990, from 646.9 million acres to 623.3 million acres. Much of the decline is attributable to BLM land disposals in Alaska and also reductions in DOD land. Numerous issues affecting federal land management are before Congress. They include the extent of federal ownership, and whether to decrease, maintain, or increase the amount of federal holdings; the condition of currently owned federal infrastructure and lands, and the priority of their maintenance versus new acquisitions; the optimal balance between land use and protection, and whether federal lands should be managed primarily to benefit the nation as a whole or instead to benefit the localities and states; and border control on federal lands along the southwest border.
Author: Richard P. Hallion
Publisher:
ISBN:
Category : Flight
Languages : en
Pages : 420
Get Book Here
Book Description
