干旱区生态环境知识资源中心(Arid): Soil polygon disaggregation through similarity-based prediction with legacy pedons

Arid

	Soil polygon disaggregation through similarity-based prediction with legacy pedons
	Liu Feng; Geng Xiaoyuan; Zhu A'xing; Walter Fraser; Song Xiaodong; Zhang Ganlin
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2016
卷号	8 期号:5 页码:760-772
英文摘要	Conventional soil maps generally contain one or more soil types within a single soil polygon. But their geographic locations within the polygon are not specified. This restricts current applications of the maps in site-specific agricultural management and environmental modelling. We examined the utility of legacy pedon data for disaggregating soil polygons and the effectiveness of similarity-based prediction for making use of the under- or over-sampled legacy pedon data for the disaggregation. The method consisted of three steps. First, environmental similarities between the pedon sites and each location were computed based on soil formative environmental factors. Second, according to soil types of the pedon sites, the similarities were aggregated to derive similarity distribution for each soil type. Third, a hardening process was performed on the maps to allocate candidate soil types within the polygons. The study was conducted at the soil subgroup level in a semi-arid area situated in Manitoba, Canada. Based on 186 independent pedon sites, the evaluation of the disaggregated map of soil subgroups showed an overall accuracy of 67% and a Kappa statistic of 0.62. The map represented a better spatial pattern of soil subgroups in both detail and accuracy compared to a dominant soil subgroup map, which was commonly used in practice. Incorrect predictions mainly occurred in the agricultural plain area and the soil subgroups that are very similar in taxonomy, indicating that new environmental covariates need to be developed. We concluded that the combination of legacy pedon data with similarity-based prediction is an effective solution for soil polygon disaggregation.
英文关键词	legacy pedon data similarity-based prediction spatial disaggregation conventional soil maps
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	History
CSCD记录号	CSCD:5755840
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335687
作者单位	Liu Feng, Institute of Soil Science, Chinese Academy of Sciences, State Key Laboratory of Soil and Sustainable Agriculture, Nanjing, Jiangsu 210008, China.; Song Xiaodong, Institute of Soil Science, Chinese Academy of Sciences, State Key Laboratory of Soil and Sustainable Agriculture, Nanjing, Jiangsu 210008, China.; Zhang Ganlin, Institute of Soil Science, Chinese Academy of Sciences, State Key Laboratory of Soil and Sustainable Agriculture, Nanjing, Jiangsu 210008, China.; Geng Xiaoyuan, Science and Technology Branch, Agriculture and Agri-Food Canada, Ottawa, K1A 0C5, Canada.; Walter Fraser, Science and Technology Branch, Agriculture and Agri-Food Canada, Ottawa, K1A 0C5, Canada.; Zhu A'xing, School of Geography, Nanjing Normal University, Nanjing, Jiangsu 210046, China.
推荐引用方式 GB/T 7714	Liu Feng,Geng Xiaoyuan,Zhu A'xing,et al. Soil polygon disaggregation through similarity-based prediction with legacy pedons[J],2016,8(5):760-772.
APA	Liu Feng,Geng Xiaoyuan,Zhu A'xing,Walter Fraser,Song Xiaodong,&Zhang Ganlin.(2016).Soil polygon disaggregation through similarity-based prediction with legacy pedons.Journal of Arid Land,8(5),760-772.
MLA	Liu Feng,et al."Soil polygon disaggregation through similarity-based prediction with legacy pedons".Journal of Arid Land 8.5(2016):760-772.