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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

Journal article

Estimates of biomass and primary productivity in a high-altitude maple forest of the west central Himalayas  [2008]

Garkoti, S. C.;

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The paper describes the biomass and productivity of maple (Acer cappadocicum) forest occurring at an altitude of 2,750 m in the west central Himalayas. Total vegetation biomass was 308.3 t ha-¹, of which the tree layer contributed the most, followed by herbs and shrubs. The seasonal forest-floor litter mass varied between 5.4 t ha-¹ (in rainy season) and 6.6 t ha-¹ (in winter season). The annual litter fall was 6.2 t ha-¹, of which leaf litter contributed the largest part (59% of the total litter fall). Net primary productivity of total vegetation was 19.5 t ha-¹ year-¹. The production efficiency of leaves (net primary productivity/leaf mass) was markedly higher (2.9 g g-¹ foliage mass year-¹) than those of the low-altitude forests of the region.

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Information bibliographique

Langue:
English
Type:
Journal Article
Sur AGRIS depuis:
2013
Volume:
23
Numéro:
1
Page initiale:
41
Page finale:
49
Editeur:
Japan : Springer Japan
Tous les titres:
" Estimates of biomass and primary productivity in a high-altitude maple forest of the west central Himalayas "
Autre:
" Includes references "

(Revue

Ecological research

ISSN : 0912-3814