Electrical Conductivity-based Mapping of Paddy Yield using TDR Soil Sensor

Harnoordeep Singh Mann; Harnoordeep Singh Mann; Aseem Verma; Manjeet Singh; Tarandeep Singh

doi:10.52151/jae2022593.1781

Authors

Harnoordeep Singh Mann Department of Farm Machinery and Power Engineering, Punjab Agricultural University, Ludhiana, Punjab, India Author
Harnoordeep Singh Mann Department of Farm Machinery and Power Engineering, Punjab Agricultural University, Ludhiana, Punjab, India Author
Aseem Verma Department of Farm Machinery and Power Engineering, Punjab Agricultural University, Ludhiana, Punjab, India Author
Manjeet Singh Department of Farm Machinery and Power Engineering, Punjab Agricultural University, Ludhiana, Punjab, India Author
Tarandeep Singh Department of Farm Machinery and Power Engineering, Punjab Agricultural University, Ludhiana, Punjab, India Author

DOI:

https://doi.org/10.52151/jae2022593.1781

Keywords:

crop yield, electrical conductivity, heat map, paddy yield, Time Domain Reflectometry (TDR)

Abstract

Electrical conductivity is a physio-chemical property of soil that correlates with soil properties that affect crop productivity. A study was conducted to map the paddy yield on the basis of apparent electrical conductivity (EC_a ) at three depth levels (L1 = 76 mm, L2 = 122 mm, L3 = 203.2 mm) measured using the Time Domain Reflectometry (TDR). The statistical correlations between ECa and paddy yield were established and variations in paddy yield were mapped. The correlation coefficient between crop yield and EC_a was highest (r2 =0.47) for measurements taken at L3, whereas paddy yield was poorly correlated with EC_a measurements at L1 (r2 =0.03). At L3, the highest paddy yield was 6.78 t.ha^-1 at EC_a of 0.359 mS.m^-1; whereas, the lowest (5.63 t.ha^-1) was at EC_a of 0.319 mS.m^-1. EC_a at L1, L2, and L3 was significantly related to paddy yield with a coefficient of determination value of 0.26. The variability maps of paddy yields would help in better management of paddy fields.

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