Rangeland Ecology & Management

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Spatial estimation of surface soil texture using remote sensing data
Author
Liao, Kaihua
Xu, Shaohui
Wu, Jichun
Zhu, Qing
Publisher
Soil Science and Plant Nutrition
Publication Year
2013
Body

Understanding the spatial distribution and variability of soil texture is essential for land use planning and other activities related to agricultural management and environmental protection. This study was conducted to evaluate Landsat Enhanced Thematic Mapper (ETM) remote sensing data as auxiliary variables for spatial estimation of surface soil texture using a limited number of soil samples taken from a site located in the city of PingduShandong ProvinceChina. Three methods of evaluating variability in surface soil texture were evaluated: (1) multiple stepwise regression (MSR) based on the relationship between surface soil sandsilt and clay contents and remote sensing data; (2) kriging of surface soil sandsilt and clay contents; (3) cokriging with remote sensing data. Correlation analysis showed that surface soil sandsilt and clay contents were significantly correlated with Landsat ETM digital number (DN) of six bands (Bands 1-5 and Band 7)and the DN of Band 7 explained most of the variability in soil sandsilt and clay contents. The DN of Band 7 was selected as auxiliary data for the estimation of surface soil texture. The cross-validation results indicated that both MSR and kriged estimates had low reliability due to the variations in landscape and the low-density sampling in the study area. Cokriging with remote sensing data significantly improves estimates of surface soil texture compared with MSR and kriging.

Language
English
Resource Type
Text
Document Type
Journal Issue/Article
Journal Volume
59
Journal Number
4
Journal Pages
488-500
Journal Name
Soil Science and Plant Nutrition
Keywords
soil texture
land use
management
agriculture
environmental protection
remote sensing
mapping
PingduShandong China