A detailed investigation into possible factors affecting the performance of the neutron moisture meter was therefore undertaken, and particular attention was paid to the effect of bulk density of the soil, that is, the weight of oven-dry soil introduced into the drums of constant volume used for...
The relative density of lunar soil The specific gravity and minimum and maximum bulk densities were determined for three one-gram lunar soil samples containing particles less than 1 mm in diameter: 14163,148; 14259,3; and 15601,82. The specific gravity varied from 2.90 to... WDI Carrier,JK...
A test method, similar to the sand-cone method, was developed that uses steel shot as the material to which a volume of soil is compared to calculate soil density. Steel shot is easily recovered and reused, eliminating the need for specialty sand and calibrated cones or containers, and ...
It may be concluded from our study that forest management practices should aim to increase the diversity of tree species of the secondary forest with the aim also to increase the soil microbiological resources like AMF communities. 展开 关键词: VAM Spore diversity Species dominance Relative ...
The PR density was higher in the downstream and biomass was higher in the upstream. 而捕食者在整个流域内的密度上游小于下游,生物量却是上游大于下游. 来自期刊摘选 19. Controlling livestock grazing density and implementing environmental restoration are important measures for soil andconservation in Iceland...
Bulk Density of Rocky Mine Soils in Forestry Reclamation. The Forestry Reclamation Approach (FRA) for reclaiming surface mined lands in Appalachia recommends minimal grading of mine soil materials to avoid surface... DeLong,C.,Skousen,... - 《Soil Science Society of America Journal》 被引量: ...
The Impact of Liquefaction on the Microstructure of Cohesionless Soils The effect of earthquake-induced liquefaction on the local void ratio distribution of cohesionless soil is evaluated using x-ray computed tomography (CT) a... A Gutierrez - Dissertations & Theses - Gradworks 被引量: 1发表: 201...
Microarthropod communities in the soil and on the bark of trees were investigated along an elevation gradient (1,850, 2,000, 2,150, 2,300m) in a tropical montane rain forest in southern Ecuador. We hypothesised that the density of microarthropods declines with depth in soil and increases ...
A soil physical parameter, S, is defined. It is equal to the slope of the soil water retention curve at its inflection point. This curve must be plotted as the logarithm (to base e) of the water potential against the gravimetric water content (kg kg−1). The value of S is indicativ...
Restoration of shortleaf pine (Pinus echinata)-hardwood ecosystems severely impacted by the southern pine beetle (Dendroctonus frontalis) In the Southern Appalachian Mountains of eastern USA, pine-hardwood ecosystems have been severely impacted by the interactions of past land use, fire exclu......