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Defining fertility management units and land suitability analysis using digital soil mapping approach

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Title Defining fertility management units and land suitability analysis using digital soil mapping approach
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Creator S. Dharumarajan, B. Kalaiselvi, M. Lalitha, R. Vasundhara & Rajendra Hegde
 
Subject Soil series; differentiating characteristics; management unit; digital soil mapping; random forest model; land suitability analysis; multicriteria approach
 
Description Not Available
Classification of fields into management units based on soil variability
and fertility is important for spatial crop planning. The present
study was conducted in Chukanagallu subwatershed
(97km2), Koppal district of Northern Karnataka Plateau, India to
map the soil fertility management units and to analyse the suitability
of soil for different crops. Random forest regression and
classification algorithms were used to map the differentiating
characteristics of soil series (soil depth, coarse fragments and soil
colour), physicochemical properties (pH, EC and OC) and fertility
parameters (P2O5, K2O, S, Fe, Mn, Zn, Cu, B). Random forest model
performed well for the prediction of fertility parameters (R2 ¼
44–73%) and physicochemical properties (R2 ¼ 39–83%) compared
to soil depth and coarse fragments (R2 ¼ 17–18%).
Predicted soil fertility parameters and physicochemical properties
were used for the delineation of different homogenous fertility
management units. Soil series characteristics and fertility parameters
were also evaluated using a multi-criteria approach for suitability
of soil for cotton, groundnut and rice cultivation and the
results showed that major area of subwatershed is moderately
suitable for the cultivation of cotton, rice and groundnut. The
management units derived from DSM approach were symmetrical
in production potential and requires similar management aspects
which are useful for appropriate planning of management strategies
such as crop selections
Not Available
 
Date 2021-07-24T13:17:25Z
2021-07-24T13:17:25Z
2021-05-01
 
Type Research Paper
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/49905
 
Language English
 
Relation Not Available;
 
Publisher Not Available