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Soil organic carbon (SOC) plays an important role in improving soil properties and the C global cycle. Limited attention, though, has been given to assessing the spatial patterns and stocks of SOC in desert ecosystems. In this study, we quantitatively evaluated the spatial variability of SOC and its influencing factors and estimated SOC storage in a region(More)
Based on a whole survey and detailed analysis in artificial Robinnia pseudoscacia forestland, distribution and characters of dry layer in soil were studied in north Shaanxi Loess Platea. The results showed that soil dry layer was distributed universally from south to north in Loess Plateau, which can be classified into four zones according to the dryness:(More)
Soil bio-crust (SBC) plays an important role in degraded ecosystem restoration. The field investigation and laboratory analysis of SBC on different year rehabilitated grasslands at the north slope of hilly Loess Plateau showed that after cropland shifted to rehabilitated grassland, rainfall- induced structural crust appeared firstly, and then, with the(More)
Soil water retention parameters are critical to quantify flow and solute transport in vadose zone, while the presence of rock fragments remarkably increases their variability. Therefore a novel method for determining water retention parameters of soil-gravel mixtures is required. The procedure to generate such a model is based firstly on the determination(More)
The upper and lower limit values of soil temperature affect crop growth and development greatly. Observations on the soil maximal and minimal temperatures under different mulching and cropping conditions in Xinjiang showed that during crop growth period in 1998 and 1999, soil temperature extremums were both at 0 cm, and varied with different observation(More)
In arid and semiarid regions of northwestern China, where evaporation exceeds precipitation, perforated plastic mulches are widely used to decrease soil water evaporation. To determine the effects of various perforated plastic mulches on soil water evaporation after irrigation, a soil column experiment was conducted, which consisted of six mulches with(More)
A field experiment was conducted in the south part of Loess Plateau with 632 mm precipitation each year. Three genotypes winter wheat 9430, Xiaoyan No. 6 and Shang188 were used as test materials to study their grain-filling characters under two nitrogen application levels (0 and 90 kg x hm(-2)). The results showed that genetic difference was the main factor(More)
With simulation test, this paper studied the patterns of rainfall infiltration and redistribution in soil on typical Loess slope land, and analyzed the quantitative relations between the infiltration and redistribution and the movement of soil water and mass, with rainfall intensity as the main affecting factor. The results showed that rainfall intensity(More)
The widespread contamination of soils and aquifers by non-aqueous phase liquids (NAPL), such as crude oil, poses serious environmental and health hazards globally. Understanding the infiltration characteristics of NAPL in soil is crucial in mitigating or remediating soil contamination. The infiltration characteristics of crude and diesel oils into(More)
According to the types of vegetation and soil, 22 soil profile samples (0 - 20 cm, 20 - 40 cm and 40 - 60 cm) were collected from different regions of Loess Plateau to approach the distribution of organic carbon pools in different sizes of soil aggregates. The results showed that the organic carbon content and storage in all sizes of soil aggregates were(More)