نتایج جستجو برای: peat and swamps
تعداد نتایج: 16828534 فیلتر نتایج به سال:
Soilless culture in greenhouse is being developed in Iran, as in many countries of the world. This study was conducted to evaluate the possibility of applying sawdust as well as the effect of adding bentonite and pumice on vegetative growth of bell pepper cv. Inspratian. The experiment was conducted as a completely randomized blocks design with 8 treatments and 4 replications, in greenhouse of ...
Abstract Development of oil palm plantations in swamps the last ten years has progressed rapidly as a result limited availability fertile lands. Due to nature environment, productivity over swamp land is quite different from other ecosystems. Studies reported that average ranges 0.8-1.2 tons fresh fruit bunch (FFB)/ha/month (equivalently 9-10 t FFB/ha). Economic analysis shows this level does n...
Deep karst depressions with a large volume of water due to a poor water drainage system (caused by a clay layer, etc.) and with steeply sloping sidewalls paludificate in a special way. Peat formation begins with dead vegetative material (leaves, etc.) floating on the water's surface in the center of the karst lake. The peat grows laterally from the center of the depression to its edges and the ...
Peat normally has high organic matter content and is generally associated with high compressibility and high magnitude and rates of creep. It may also be associated with poor strength characteristics and a risk of large deformation. The main specifications in the peat nature are the presence of acidic or less commonly alkaline media, combined with a high level of ground water. One of the most c...
Zoltai, S.C. 1995. Regional variations in peatland ecosystems of west-central Canada through time. Gunneria 70: 35-42. Peatland ecosystems respond to major changes in their environment induced by prolonged changes in climate. In the western boreal region of Canada, permafrost occurs only in Sphagnum-dominated peatlands. In the north, the palsas and peat plateaus are associated with well-defined...
Little is known about the processes of infiltration and water movement in the upper layers of blanket peat. A tension infiltrometer was used to measure hydraulic conductivity in a blanket peat in the North Pennines, England. Measurements were taken from the surface down to 20 cm in depth for peat under four different vegetation covers. It was found that macropore flow is a significant pathway f...
A review of Staphylinidae known from peat bogs of Belarus is presented with data on their distribution at various sites. The staphylinid fauna, as reported here, includes 66 species, 33 genera, and 10 subfamilies. The results showed a low species richness of rove beetles and a high occurrence of a small number of species. The regional zoogeography and composition of rove beetles in the Belarusi...
The distribution of periphytic algae communities depends on various factors such as type of substrate, level of disturbance, nutrient availability and light. According to the prediction that impacts of anthropogenic activity provide changes in environmental characteristics, making impacted Palm swamps related to environmental changes such as deforestation and higher loads of nutrients via alloc...
We address the problem of quickly finding shortest paths in known graphs. We propose a method that relies on identifying areas that tend to be searched needlessly (areas we call swamps), and exploits this knowledge to improve search. The method requires relatively little memory, and reduces search cost drastically, while still finding optimal paths. Our method is independent of the heuristics u...
We report on the first outbreak of epizootic ulcerative syndrome (EUS) amongst wild fish populations in the Bangweulu swamps, an inland delta, in the north of Zambia during 2014. The area supports a large and diverse fish fauna related to, but distinct from, that of the Zambezi River system where EUS outbreaks have occurred since 2006. A sizeable artisanal fishery, based on extensive fish weirs...
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