This study quantified the distribution and variation of soil water storage in a Pinus sylvestris (P. sylvestris) plantation under various stand ages (20, 30, 40, 50 and 60 years) along 0–1000 cm soil profile in the Mu Us sandy lands (North China). Results indicated that the 20-yr ...
Figure 2: Mollisol soil profile showing thick dark A horizon with high organic matter content. Photo courtesy of USDA. Soil pH Often referred to as the master variable of soil, pH controls a wide range of physical, chemical, and biological processes and properties that affect soil fertility an...
Throughout the soil profile—but to a greater extent in the subsoil—physiologic and genomic measurements show that phylogenetically different microbes could utilize complex organic compounds, dampening the effect of altered resource availability induced by warming. We find subsoil microbes had 20% ...
SWC was measured mainly in farmland, natural grasslands and plantations of Caragana from the surface to more than 20 m depth. The same soil samples were also tested for particle size. The results show that the soil desiccation is formed in the caragana forest in 3–18 m soil layers, but ...
The five main layers of the Earth’s atmosphere. Image:NASA, public domain. Hydrosphere All of the water on Earth is known collectively as the Earth’s hydrosphere. This is water found in the air, the soil, in glaciers, the oceans, rivers, lakes, and streams of the world. ...
the soil profile, the subsurface soil (i.e., deeper than 20 cm) contains nearly 35% of the total microbial biomass and also harbors diverse microbes [15,16]. In particular, the huge reservoirs of subsurface soil microbiomes can play potentially important roles in soil formation, pollutant ...
A. Drits, “Determination of Illite-Smectite Structures Using Multispecimen X-Ray Profile Fitting,” Clays Clay Miner. 47 (5), 555–566 (1999). Google Scholar N. E. Smeck and J. M. Novak, “Weathering of Soil Clays with Dilute Sulfuric Acid as Influenced by Sorbed Humic Substances,”...
Soil was collected from a soil profile with 100-cm depth using a spade. Roots were cut with scissors and placed in plastic bags, and then stored in a laboratory refrigera- tor at 4°C. Triaxial compression tests were conducted with a KTG Automatic Triaxial Compression System (Beijing Huakan...
Decomposition of soil organic matter (SOM) can be stimulated by fresh organic matter input, a phenomenon known as the ‘priming effect’. Despite its global importance, the relationship of the priming effect to mineral weathering and nutrient release rem
Different values for different soil layers were used as the features mentioned above change across the soil profile. Consequently, 180 features for soil characteristics of the locations under study were obtained from the Web Soil Survey46 Corn Yield: Yearly corn yield data in bushel per acre, ...