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Land Resource Study of Hodeidah Green Belt Area.

Field document 12.








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    Project
    The Soils of the South-eastern Coastal Area. Part 2. The Soils of upper Hajar Valley.
    Field document 21
    1999
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    This study deals with the semi-detailed soil survey of the Upper Hajar area. The objective of this activity is to make a comprehensive: soil resource inventory of the study area, with particular emphasis on areas with agricultural potential, and advise on suitable management practices, taking into account the climatic conditions as well. The report covers various aspects of the soil resources, including .factors related to soil development, methods of field and laboratory study, soil suitabiliti es for various climatically adapted crops, and associated land husbandry practices. Many of the soils in .the study area have formed under a more or less continuous process of sediment deposition by wadi floods, which has given rise to a stratified surface layer. Such soils have been rated as the most suitable arable soils (unit W). They are deep, have a finer texture than the other soils in the study area, and hence possess a good water holding capacity. Because of their alluvial origin, they a re also reasonably fertile. Date-palms dominate these areas.
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    Soil Survey and Land Classification, Republic of Yemen. Land suitability for irrigated sorghum (Seifi) in Wadi Mawr (Tihama).
    Technical Note 8.
    1991
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    The purpose of this evaluation is to determine the land suitability of the Wadi Mawr area for the cultivation of (spate) irrigated sorghum under improved traditional management, and to determine the yield response to additional water gifts on various soil types. The evaluation was carried out for the alluvial plain, i.e. hills, dunes and wadi beds were excluded, and takes into account the following soil qualities and characteristics: drainage, salinity of the rootzone, surface sealing and the oc currence of crusts, effective soil depth and the available water holding capacity of the rootzone.
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    Article
    Why is artificial afforestation crucial for restoring nature? Studies on the dried bottom of Aral Sea, Kazakhstan
    XV World Forestry Congress, 2-6 May 2022
    2022
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    The Aral Sea, formerly the fourth largest inland lake located in Central Asia, has reduced dramatically as it lost most of its volume due to the large-scale water withdrawal for the cultivation of irrigated crops starting from the 1960s. The desiccated seafloor has become a source of salt, sand, and dust transfer to the adjacent regions, negatively affecting human health and the environment by inhibiting the survival and growth of the vegetation. In response, to stabilize the saline sand blowing from the Aral seabed, multiple domestic and international efforts have been performed to establish vegetation cover with indigenous trees of Haloxylon species as well as other salt- and water-stress tolerant woody and herbaceous plants of the region. As part of the afforestation project supported by the Korea Forest Service (South Korea) in Kazakhstan, field studies examined the impacts of the afforestation on carbon stock and soil quality. The summarized findings are as follows: 1) growth of planted seedlings indicates the measurable sequestration of carbon, which ultimately help to estimate its contribution to climate change mitigation by calculating the atmospheric greenhouse gas reductions; 2) afforestation increased the soil organic matter content which is closely related to soil fertility; 3) afforestation improved soil chemical properties for plants and soil microbes; 4) soil amelioration effects by the afforestation were statistically similar to those by natural vegetation succession. However, the soil conditions in the natural succession area improved after almost 50 years versus about 15 years in the afforested area. This signifies the relative efficiency of afforestation activities and thus helps justify the investments made. Based on the studies, we recommend further research to raise the efficiency of afforestation in arid areas, thereby reinforcing ecosystem restoration and climate change mitigation. Keywords: Aral Sea; afforestation; desertification; climate change; restoration; soil amelioration; carbon stock ID: 3615605

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