Sökning: "soil conservation"

Visar resultat 1 - 5 av 48 avhandlingar innehållade orden soil conservation.

  1. 1. Essays on Soil Conservation, Social Capital and Technology Adoption

    Författare :Wilfred Nyangena; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Kenya; social capital; soil and water conservation; technology adoption; farm productivity;

    Sammanfattning : Erosion of agricultural land remains a major constraint to agricultural development in Kenya, which has a complex topography. Government and donor institutions are promoting soil and water conservation practices. Several hypotheses have been put forward to explain the process and driving forces for the adoption of these practices. LÄS MER

  3. 2. Carbon stock and fluxes in Nyungwe forest and Ruhande Arboretum in Rwanda

    Författare :Donat Nsabimana; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Carbon stock; Litterfall production; Soil CO2 efflux; or soil respiration; Soil temperature; Soil water content; Spatial variation; Seasonal and diurnal variations;

    Sammanfattning : Conservation and sequestration of carbon in forest ecosystems are potential strategies to reduce or stabilize the atmospheric greenhouse gas concentrations and mitigate climate change. Estimating the... LÄS MER

  4. 3. Effects of drought on boreal forest understory species

    Författare :Irena A. Koelemeijer; Kristoffer Hylander; Johan Asplund; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; biodiversity conservation; boreal forests; bryophytes; canopy cover; climate change; drought; extreme climatic events; forest management; forest understory; fungi; lichens; plants; rainout shelter; soil communities; soil moisture; transplant experiment; Ecology and Evolution; ekologi och evolution;

    Sammanfattning : Extreme climatic events, such as droughts, can have large effects on biodiversity. Drought effects in forest understories are variable over small spatial scales and can be exacerbated, or buffered, by the local vegetation structure, distance to forest edges, hydrology, and soil characteristics. LÄS MER

  5. 4. The village that vanished : The roots of erosion in a Tanzanian village

    Författare :Vesa-Matti Loiske; Ulf Sporrong; Aud Talle; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; soil erosion; soil conservation; Tanzania; Iraqw; social stratification; land tenure; Mama Issara; Giting; Hanang; Political Ecology; Scientific realism; Geography; villagization; Human geography; Kulturgeografi; Human Geography; kulturgeografi;

    Sammanfattning : In the village'of Citing in the northern highlands of Tanzania, the factors: social stratification, land tenure, production strategies, investment patterns and the economic uncertainties of society are studied and their relationship to land degradation is examined. The main assumption of the study is that the causes of land degradation are so complex that a methodology that emphasises contextualisation has to be used. LÄS MER

  7. 5. Making the Most of It? : Understanding the social and productive dynamics of small farmers in semi-arid Iringa, Tanzania

    Författare :Peter Gregersen; Sociologi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Social changes; Malthus; Boserup; Tanzania; semi-arid Africa; Iringa; conservation; sustainability; soil fertility; degradation; population; Matthew principle; social differentiation; farmerisation; de-peasantisation; livelihood diversification; rural change; agrarian change; agricultural change; small farmers; dynamics; theory of social work; Sociala förändringar; teorier om socialt arbete; Malthus; Boserup; Tanzania;

    Sammanfattning : While much of semi-arid Africa is still sparsely populated with unused land, there are everywhere pockets of high and increasing population density in attractive locations. Small-scale farmers can respond to beginning land-scarcity in a number of ways. LÄS MER