Arid
DOI10.1016/j.geodrs.2017.03.003
Digital soil mapping of sand content in arid western India through geostatistical approaches
Santra, Priyabrata; Kumar, Mahesh; Panwar, Navraten
通讯作者Santra, Priyabrata
来源期刊GEODERMA REGIONAL
ISSN2352-0094
出版年2017
卷号9页码:56-72
英文摘要

Digital maps of sand content of arid western India were prepared using legacy soil data published by National Bureau of Soil Survey and Land Use Planning, Nagpur following digital soil mapping (DSM) approach. In the first step, profile data was harmonized to standard depths as followed by GlobalSoilMapping programme e.g. 05 cm, 5-15 cm, 15-30 cm, 30-60 cm, 60-100 cm and 100-200 cm using mass preserving spline tool in R. Four different approaches of DSM methodology were applied to prepare sand content map of arid western India and these are ordinary kriging (OK), universal kriging (UK)/kriging with eternal drift (KED), random forest regression and regression kriging (RK). Apart from legacy soil data, information on auxiliary and environmental variables e.g. soil map, terrain attributes and bioclimatic variables were used in the DSM methodology. Trend of covariates were fitted using random forest regression and the R-2 of fitted trend was found 0.21-0.28. The accuracy of the prepared digital products was evaluated through k-fold cross validation approach. Lin’s concordance correlation coefficient (LCCC) was found 0.47-0.55 for KED, 0.45-0.51 for RK, 0.43-0.51 for random forest regression and 0.28-0.43 for OK. Apart from LCCC, other evaluation indices e.g. R-2, root mean squared error (RMSE) and bias also showed the best performance of KED to predict sand content followed by RK, random forest regression and OK. The prepared digital products will be quite useful to take decisions on appropriate and region specific soil managements. The prepared maps may further be uploaded in web map services for its wider access by end users. (c) 2017 Elsevier B.V. All rights reserved.


英文关键词Digital soil mapping Arid Western India Semivariogram Kriging Aridisol Inceptisol Entisol
类型Article
语种英语
国家India
收录类别SCI-E
WOS记录号WOS:000457277600007
WOS类目Soil Science
WOS研究方向Agriculture
来源机构ICAR Central Arid Zone Research Institute
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/199220
作者单位ICAR Cent Arid Zone Res Inst, Jodhpur 342003, Rajasthan, India
推荐引用方式
GB/T 7714
Santra, Priyabrata,Kumar, Mahesh,Panwar, Navraten. Digital soil mapping of sand content in arid western India through geostatistical approaches[J]. ICAR Central Arid Zone Research Institute,2017,9:56-72.
APA Santra, Priyabrata,Kumar, Mahesh,&Panwar, Navraten.(2017).Digital soil mapping of sand content in arid western India through geostatistical approaches.GEODERMA REGIONAL,9,56-72.
MLA Santra, Priyabrata,et al."Digital soil mapping of sand content in arid western India through geostatistical approaches".GEODERMA REGIONAL 9(2017):56-72.
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