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	Predication of soil water storage by spatial dependence in a deposited soil farmland
	Zhao P. ; Shao M. A.
	2011
关键词	Autocorrelation check-dam linear regression soil water content loess plateau variability
英文摘要	Spatial dependence was widely recognized in field observations and the existence was very helpful to the development of precision agriculture. On the Loess Plateau of China, the soil water contents (SWCs) at a deposited soil farmland (DF) were measured using the neutron tubes on two sampling lines during two years. The objectives of this research were to recognize their spatial dependence to predict soil water storage (SWS) and to divide the DF for future study in such kind farmland. The results showed that the mean SWCs of 0-80 cm soil depth decreased at the prior part and increased at the later part of the DF. The coefficient of variation (CV) decreased exponentially with the mean SWC on all observations. Estimated autocorrelation values began at higher value than critical criteria and gradually decreased towards negative values following the increased lag distance. The Moran's I and ACF both illustrate the existence of spatial correlation of neighboring points on the silting direction, and the cluster characteristics were used to predicate SWS and divide the DF. The topsoil water contents (10 cm) have a good linear relationship with its SWSs (80 cm) since the deposition characteristics of sediment. Three parts of DF should be divided in the related studies on such land. Future studies should focus on the spatial dependence of more soil variables at the DF to help the development of precision agriculture and manage soil resources.
出处	African Journal of Agricultural Research
卷	6
期	9
页	2051-2058
收录类别	SCI
语种	英语
ISSN号	1991-637X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/22291]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhao P.,Shao M. A.. Predication of soil water storage by spatial dependence in a deposited soil farmland. 2011.

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