Soil is made up of a number of layers (层) ,each having its own distinctive color and texture.The upper layer is known as the litter.It acts like a blanket,limiting temperature changes and reducing water loss.The topsoil layer is made up of small particles of rock mixed...
Soil, the biologically active, porous medium that has developed in the uppermost layer of Earth’s crust. It is one of the principal substrata of life on Earth, serving as a reservoir of water and nutrients, as a medium for the filtration and breakdown o
This research concludes that XG, GG, and BG have the tendency to increase the cohesion of silty sand, but ultimately reduce the friction angle of the silty sand. The increase of cohesion is the result of the binding properties of biopolymers that glue the soil particles together. However, bio...
applied nano Fe3O4 particles to the soil, and found the urease activity enhanced, and a significant dose-effect relationship was established. The reason of this phenomenon is that the urease is a metal enzyme with a molecular weight of 480,000 Da, containing trace amounts of transition metal...
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Microbiome engineering – the targeted manipulation of microbial communities – is considered a promising strategy to restore ecosystems, but experimental support and mechanistic understanding are required. Here, we show that bacterial inoculants for soi
阅读理解. Have you ever noticed the colour of the water in a river or stream after a heavy rainfall? What do you think caused this change in colour? It is soil that has been washed into the river from the riverbank or from the nearby fields. Components
Soil erosion is a natural geological phenomenon resulting from the removal of soil particles by water or wind (Gitas et al.2009). This natural process can be accelerated by human activities creating soil loss that exceeds the soil formation rate in a given area. Human activities that change la...
A number of studies have shown that mean particle size of loess is at least partly a function of distance from the source, where there is a systematic winnowing of coarse particles in the downwind direction. In China, for example, loess in the northwestern part of the Loess Plateau is descr...
that integrates the Soil and Water Assessment Tool (SWAT) with a geographical information system (GIS) for simulating soil erosion risk within a small mountainous watershed that is an upstream area of the Bo River watershed in Central Vietnam. The spatial patterns of annual soilerosion ratefrom ...