نتایج جستجو برای: eroded soils
تعداد نتایج: 51655 فیلتر نتایج به سال:
In a proof-of-concept study, an acidic (pH 5.8) biochar was created using a low pyrolysis temperature (350 °C) and steam activation (800 °C) to potentially improve the soil physicochemical status of an eroded calcareous soil. Biochar was added at 0%, 1%, 2%, and 10% (by wt.) and soils were destructively sampled at 1, 2, 3, 4, 5, and 6 month intervals. Soil was analyzed for gravimetric water con...
The soils at the Opportunity site are fine-grained basaltic sands mixed with dust and sulfate-rich outcrop debris. Hematite is concentrated in spherules eroded from the strata. Ongoing saltation exhumes the spherules and their fragments, concentrating them at the surface. Spherules emerge from soils coated, perhaps from subsurface cementation, by salts. Two types of vesicular clasts may represe...
During 1971 and 1972 a detailed study was conducted on a fallow field in the proposed Oahe Irrigation Project to determine the relationship between the tonal variation observed on aerial photographs and the properties of eroded soil. Correlation and regression analysis of digitized, multiemulsion, color infrared film (2443) data and detailed field data revealed a highly significant correlation ...
We have developed a mass balance analysis of organic carbon (OC) across the five major river subsystems of the Mississippi (MS) Basin (an area of 3.2 3 106 km2). This largely agricultural landscape undergoes a bulk soil erosion rate of ;480 t·km22·yr21 (;1500 3 106 t/yr, across the MS Basin), and a soil organic carbon (SOC) erosion rate of ;7 t·km22·yr21 (;22 3 106 t/yr). Erosion translocates u...
A new method of digital mapping the soil cover pattern with calculation share soils different taxa and degree classes for erosion in associations is proposed. comparative analysis maps obtained using methods construction (visual expert digital) their contents (displaying dominant or associations) has been performed. In case by visual (with display soil), a significant underestimation total area...
Introduction: Marl is one of the most important sedimentary units are in Iran because of the physicochemical characteristics and high rate of erodibility. These properties caused large civil damages and environmental impacts and so, the study of erosion and erodibility of the marl units is necessary. One of the most important points about marls is elements in them and grain size nature and ...
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