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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Journal Article

Статья в журнале

Shifts and future trends in the forest resources of the Central Hardwood Region  [2003]

Schmidt, Thomas L.; McWilliams, William H.;

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Forests in the Central Hardwood region are undergoing change in terms of area, volume, species composition, and forest structure. These forests are dominated by deciduous species; are increasing their average stand size, volume, and age; and, are experiencing woody plant species replacement as shade intolerant species are being replaced by more shade tolerant species. As changes progress, concerns are being raised regarding the potential for these lands to produce the wide array of benefits associated with timberland. Changes in the forest resource as well as changes in land ownership and management objectives have repercussions for wildlife species, timber industries, recreational interests, and the wide array of other benefits reaped from this invaluable resource.

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Библиографическая информация

Язык:
English
Тип:
Journal Article
В АГРИСе с:
2013
Стартовая страница:
21
Конечная страница:
31
Издатель:
St. Paul, Minn. : North Central Research Station, Forest Service, U.S. Dept. of Agriculture, 2003.
Все названия:
" Shifts and future trends in the forest resources of the Central Hardwood Region "
Другое:
" Includes references "

Журнал

13th Central Hardwood Forest Conference proceedings of a conference held at the University of Illinois Urbana-Champaign, Illinois, April 1-3, 2002 / edited by: J.W. Van Sambeek ... [et al.]