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Titlebook: Directions in Tropical Agroforestry Research; Adapted from selecte P. K. R. Nair,C. R. Latt Book 1998 Springer Science+Business Media Dordr

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發(fā)表于 2025-3-21 16:37:38 | 只看該作者 |倒序?yàn)g覽 |閱讀模式
書目名稱Directions in Tropical Agroforestry Research
副標(biāo)題Adapted from selecte
編輯P. K. R. Nair,C. R. Latt
視頻videohttp://file.papertrans.cn/281/280694/280694.mp4
叢書名稱Forestry Sciences
圖書封面Titlebook: Directions in Tropical Agroforestry Research; Adapted from selecte P. K. R. Nair,C. R. Latt Book 1998 Springer Science+Business Media Dordr
描述Large areas of the warm, humid tropics in Southeast Asia, the Pacific, Latin America, the Caribbean, and Africa are hilly or mountainous. Jackson and Scherr (1995) estimate that these tropical hillside areas are inhabited by 500 million people, or one-tenth of the current world population, many of whom practice subsistence agriculture. The region most affected is Asia which has the lowest area of arable land per capita. Aside from limited areas of irrigated terraces, most of the sloping land, which constitutes 60% to 90% of the land resources in many Southeast Asian countries, has been by-passed in the economic development of the region (Maglinao and Hashim, 1993). Poverty in these areas is often high, in contrast to the relative wealth of irri- gated rice farms in lowland areas that benefited from the green revolution. Rapid population growth in some countries is also exacerbating the problems of hillside areas. Increasingly, people are migrating from high-potential lowland areas where land is scarce to more remote hillside areas. Such migra- tion, together with inherent high population growth, is forcing a transforma- tion in land use from subsistence to permanent agriculture on
出版日期Book 1998
關(guān)鍵詞Forestry; Plantation; agronomy; forest; paper; policy; soil; soil science; tree
版次1
doihttps://doi.org/10.1007/978-94-015-9008-2
isbn_softcover978-90-481-5025-0
isbn_ebook978-94-015-9008-2Series ISSN 0924-5480 Series E-ISSN 1875-1334
issn_series 0924-5480
copyrightSpringer Science+Business Media Dordrecht 1998
The information of publication is updating

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Soil improvement by trees in sub-Saharan Africa, through (1) input of N by biological N. fixation, (2) retrieval of nutrients from below the rooting zone of crops and (3) reduction in nutrient losses from processes such as leaching and erosion. Trees can increase the availability of nutrients through increased release of nutrients from soil organ
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Shade management in coffee and cacao plantations,so compete for growth resources. For example, shade trees buffer high and low temperature extremes by as much as 5 °C and can produce up to 14 Mg ha. yr. of litterfall and pruning residues, containing up to 340 kg N ha. yr.. However, N. fixation by leguminous shade trees grown at a density of 100 to
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Directions in tropical agroforestry research: past, present, and future,d experiential approach but have subsequently followed a deductive and experimental approach that includes hypothesis testing and the development of predictive capability; agroforestry research is thus being transformed into a rigorous scientific activity. The research agenda, so far, has given high
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