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Digital soil mapping of key GlobalSoilMap properties in northern Karnataka plateau

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Title Digital soil mapping of key GlobalSoilMap properties in northern Karnataka plateau
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Creator S. Dharumarajan, B. Kalaiselvi, Amar Suputhra, M. Lalitha, Rajendra Hegde, S.K. Singh, Philippe Lagacherie
 
Subject Digital soil mapping Vertisols Alfisols Quantile regression forest Soil properties Field capacity Permanent wilting point
 
Description Not Available
Accurate and quantitative information on soil properties of each and every location is essential for site specific
sustainable management of land resources. A study was conducted to predict the different key soil properties
of Northern Karnataka as per GlobalSoilMap specifications using Quantile Regression Forest (QRF) Model.
Along with Sentinel-2 data, terrain attributes such as elevation, slope, aspect, topographic wetness index,
topographic position index, plan and profile curvature, multi-resolution index of valley bottom flatness,
multi-resolution ridge top flatness and vegetation factors like NDVI and EVI were used as covariates. Equalarea
quadratic splines were fitted to soil profile datasets to estimate soil properties viz. pH, OC, CEC, clay, sand,
silt, field capacity and permanent wilting point at six standard soil depths (0–5, 5–15, 15–30, 30–60, 60–100
and 100–200 cm) as per GlobalSoilMap specifications. The coefficient of determination (R2), mean error (ME)
and root mean square error (RMSE) were calculated in order to assess model performance. Prediction interval
coverage percentage (PICP) was calculated to evaluate the associated uncertainty predictions. The predicted
soil properties are reliable with minimum errors and the QRF model captured maximum variability for most of
the soil properties.
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Date 2020-05-22T07:26:44Z
2020-05-22T07:26:44Z
2020-01-01
 
Type Research Paper
 
Identifier S. Dharumarajan, B. Kalaiselvi, Amar Suputhra, M. Lalitha, Rajendra Hegde, S.K. Singh, Philippe Lagacherie.2020. Digital soil mapping of key GlobalSoilMap properties in northern Karnataka plateau, Geoderma Regional, https://doi.org/10.1016/j.geodrs.2019.e00250
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http://krishi.icar.gov.in/jspui/handle/123456789/36131
 
Language English
 
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Publisher Not Available