نتایج جستجو برای: eroded soils
تعداد نتایج: 51655 فیلتر نتایج به سال:
1 Vegetation mosaics of grassland and exposed soil are often the outcome of intense herbivory and represent alternate stable states, although the vegetational and soil processes that both initiate and maintain the states in response to herbivory are poorly understood. 2 The vegetation mosaic resulting from grubbing by geese was examined on the intertidal flats at La Pérouse Bay, Manitoba. Soil ...
[1] The Mössbauer (MB) spectrometer on Opportunity measured the Fe oxidation state, identified Fe-bearing phases, and measured relative abundances of Fe among those phases at Meridiani Planum, Mars. Eight Fe-bearing phases were identified: jarosite (K,Na,H3O)(Fe,Al)(OH)6(SO4)2, hematite, olivine, pyroxene, magnetite, nanophase ferric oxides (npOx), an unassigned ferric phase, and metallic Fe (k...
Seashores and river bottoms are constantly eroded by the flow processes. Grains of various types, including gravel, sand, silt, clay, mixed at different ratios, demonstrating varying characteristics, constituent materials these eroding land features. The present study quantifies importance geomechanical properties soils, with a large fraction granular material smaller portion fine grain particl...
Agriculture has two ways to increase its output, expanding the land area under cultivation and improving the yields on cultivated land. If agricultural growth and performance taken to increase the farming incomes of rural families, then a third way can be added, i.e. shifting the product composition to higher value products. For decades, it has been commented that, globally the possibilities fo...
Abstract Aims Grassland-to-shrubland transition is a common form of land degradation in drylands worldwide. It often attributed to changes disturbance regimes, particularly overgrazing. A myriad direct and indirect effects (e.g., accelerated soil erosion) grazing may favor shrubs over grasses, but their relative importance unclear. We tested the hypothesis that topsoil “winnowing” by wind erosi...
Soil erosion, runoff and related nutrient losses are a big risk for soil fertility in Cabo Verde drylands. In 2012, field trials were conducted in two agro-ecological zones to evaluate the effects of selected techniques of soil-water management combined with organic amendments (T1: compost/manure + soil surfactant; T2: compost/animal or green manure + pigeon-pea hedges + soil surfactant; T3: co...
The paper deals with morphological properties of agrogenically transformed chestnut soils slope lands in the south Volga upland within urban landscape Volgograd. It is established that as a result agrogenesis, erosion, land use change, well agroforestry reclamation measures performed, both anthropogenic deeply and postagrogenic have been formed. greatest changes under influence agrogenesis are ...
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