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- W1558908524 abstract "Estimation of spatio-temporal change of soil is needed for various purposes. Commonly used methods for the estimation have some shortcomings. To estimate spatio-temporal change of soil organic matter (SOM) in Jiangsu province, China, this study explored benefits of digital soil maps (DSM) by handling mapping uncertainty using stochastic simulation. First, SOM maps on different dates, the 1980s and 2006–2007, were constructed using robust geostatistical methods. Then, sequential Gaussian simulation (SGS) was used to generate 500 realizations of SOM in the area for the two dates. Finally, E-type (i.e. conditional mean) temporal change of SOM and its associated uncertainty, probability and confidence interval were computed. Results showed that SOM increased in 70% of Jiangsu province and decreased in the remaining 30% during the past decades. As a whole, SOM increased by 0.22% on average. Spatial variance of SOM diminished, but the major spatial pattern was retained. The maps of probability and confidence intervals for SOM change gave more detailed information and credibility about this change. Comparatively, variance of spatio-temporal change of SOM derived using SGS was much smaller than sum of separate kriging variances for the two dates, because of lower mapping variances derived using SGS. This suggests an advantage of the method based on digital soil maps with uncertainty dealt with using SGS for deriving spatio-temporal change in soil." @default.
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- W1558908524 date "2012-07-10" @default.
- W1558908524 modified "2023-10-01" @default.
- W1558908524 title "Spatio-temporal change of soil organic matter content of Jiangsu Province, China, based on digital soil maps" @default.
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- W1558908524 doi "https://doi.org/10.1111/j.1475-2743.2012.00421.x" @default.
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