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• W3116169620 endingPage "e0244322" @default.
• W3116169620 startingPage "e0244322" @default.
• W3116169620 abstract "The hilly red soil region of southern China suffers from severe soil erosion that has led to soil degradation and loss of soil nutrients. Estimating the content and spatial variability of soil organic carbon (SOC) and soil total nitrogen (STN) and assessing the influence of topography and land-use type on SOC and STN after years of soil erosion control are important for vegetation restoration and ecological reconstruction. A total of 375 topsoil samples were collected from Changting County, and their SOC and STN distributions were studied by using descriptive statistics and geostatistical methods. Elevation, slope, aspect and land-use type were selected to investigate the impacts of natural and human factors on the spatial heterogeneity of SOC and STN. The mean SOC and STN concentrations were 15.85 and 0.98 g kg -1 with moderate spatial variations, respectively. SOC and STN exhibited relatively uniform distributions that decreased gradually from the outside parts to the center of the study area. The SOC and STN contents in the study area were still at moderate and low levels after years of erosion control, which suggests that soil nutrient improvement is a slow process. The lowest SOC and STN values were at lower elevations in the center of Changting County. The results indicated that the SOC and STN contents increased most significantly with elevation and slope due to the influence of topography on the regional natural environment and soil erosion in the eroded hilly region. No significant variations were observed among different slope directions and land-use types." @default.
• W3116169620 created "2021-01-05" @default.
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• W3116169620 date "2020-12-21" @default.
• W3116169620 modified "2023-09-25" @default.
• W3116169620 title "Assessing spatial variability of soil organic carbon and total nitrogen in eroded hilly region of subtropical China" @default.
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• W3116169620 doi "https://doi.org/10.1371/journal.pone.0244322" @default.
• W3116169620 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7751969" @default.
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• W3116169620 hasPublicationYear "2020" @default.
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