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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.

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Journal Article

期刊文章

Agrobiodiversity and Genetic Erosion of Crop Varieties and Plant Resources in the Central Great Caucasus  [2017]

Akhalkatsi, M.; A. Otte; G. Arabuli; L. Mazanishvili; et al.

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Kazbegi Municipality is located in the Central Great Caucasus at an altitude between 1250 and 5047 m a.s.l. Agriculture of this area is extreme internal variability and complexity, with a multiplicity of highly localized providing the habitats and agricultural lands for much genetic erosion of crop varieties, animals, plants, fungi, and other life forms for wild plant resources. Historically, Kazbegi producers had begun cultivating the land to prepare for planting in of distribution local varieties of wheat, barley, rye, oats, etc. In the only cereals, legumes, herbs and some fruits are cultivated in alpine zone as the upper limit till the location of 2160 m a.s.l. Genetic erosion has been determined historically of aboriginal crops from sheep and cattle grazing problem and reached extreme levels from 1970s in Kazbegi Municipality and causes a problem to maintain agriculture. Plant resources remained in forests and subalpine grasslands and shrub lands. The problems of these materials are habitat degradation by disturbance in many forest types with destroyed and burned. Tree seedlings are grazing by animals and forest is not restoring naturally. Forest planting is good relation for restoration of plant wild species resources. Investigation on exchange on mountain agriculture and plant resources will now be rapidly accelerated in the vital interests of mountain communities.
来自期刊
Annals of Agrarian Science
ISSN : 1512-1887

书目信息

语言:
English
类型:
Journal Article
自何时收录于AGRIS:
2017
卷:
2017,
起始页:
.
出版者:
Elsevier B.V.
所有题名:
"Agrobiodiversity and Genetic Erosion of Crop Varieties and Plant Resources in the Central Great Caucasus"@eng
其它:
"Pre-press version"
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书目信息

语言:
English
类型:
Journal Article
自何时收录于AGRIS:
2017
卷:
2017,
起始页:
.
出版者:
Elsevier B.V.
所有题名:
"Agrobiodiversity and Genetic Erosion of Crop Varieties and Plant Resources in the Central Great Caucasus"@eng
其它:
"Pre-press version"