Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 2352-0094 |
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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