the superficial strata of ground have been perennially exposed to the action of natural agents such as heat, cold and water. however, grazing agent was not different from them when soils were investigated from temperate rangelands of kashmir and caused the soil compaction, soil structure degradation and loss of soil organic c and c/n ratio. soils from three grazing intensities were investigated...

Mechanized forest harvest operations induce changes in soil physical properties, which have the potefitial to impzct soil sustai~ability and forest productivity. The assessment of soil compaction and its spatial variability has been determined previously through the identification and tabulation of visual soil disturbance classes and soil physical changes associated with each disturbailce class...

Understanding the controls on soil carbon dynamics is crucial for modeling responses of ecosystem carbon balance to global change, yet few studies provide explicit knowledge on the direct and indirect effects of forest stands on soil carbon via microbial processes. We investigated tree species, soil, and site factors in relation to soil carbon density and mineralization in a temperate forest of...

Climate change predictions for the Great Plains region of North America include reduced growing season precipitation. The consequence of this prediction for soil fauna and belowground processes was investigated at two spatial scales by integrating experimental manipulation of soil moisture levels with natural variation in soil-water availability. Experiments consisted of (1) reciprocal core tra...

VelcheVa, I., S. PetroVa, I. MolloV, G. GecheVa and D. GeorGIeV, 2012. Herbicides influence the community structure of the soil mezofauna. Bulg. J. Agric. Sci., 18: 742-748 A field bioassay was carried out to assess the impact of “NIRVANA” (active substances imazamox and pendimethalin) and “STOMP 330 EC” (active substance pendimethalin) herbicides residues to the soil mezofauna. The investigate...

Recent investigations have shown that the influences of Soil-Structure Interaction (SSI) may be detrimental to the seismic response of structure, and hence neglecting this phenomenon in analysis and design may lead to an un-conservative design. The objective of this paper is to quantify the effects of nonlinear soil-structure interaction on the seismic response of a low-rise special moment fram...

Objective: To highlight the need and the potential for an integrated understanding of three key soil-based drivers of plant community structure and dynamics – soil fertility, soil heterogeneity, and microbes. Location: European and North American grasslands. Methods: Review and discussion of conceptual models and empirical literature, including examples of observational and manipulative studies...

The finite element method (FEM) is often used as the conventional method in computational geomechanics. However, dealing with the large deformation and failure is generally a difficult task for FEM since this method is suffered from grid distortions. In order to resolve this problem, the development of smoothed particle hydrodynamics (SPH) to simulate large deformation and failure of geomateria...