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April 2019 Vol. 7 No.4

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Ajayi AS
Ibrahim R

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Merit Research Journal of Agricultural Science and Soil Science (ISSN: 2350-2274) Vol. 7(4) pp. 063-070, April, 2019

Copyright © 2019 Merit Research Journals
DOI: 10.5281/zenodo.2653889

Original Research Article

Performance of Soilwat Model for Soil Physical Properties Simulation in Auchi, Edo State


*1Ajayi A. S., 1Eriakha E. C., 2Abu Malik and 1Ibrahim Rasheed


1Department of Agricultural and Bio-Environmental Engineering Technology, Auchi Polytechnic Auchi, Edo State Nigeria
2Department of Agricultural Technology, Auchi Polytechnic Auchi Edo State Nigeria

*Corresponding Author’s E-mail: ajayistan@gmail.com

Accepted April 24, 201




The physical properties of soils are dominant factors affecting the use of a soil which determine the availability of O2 in soils, the mobility of water into and through soils and case of root penetration and also the chemical and biological behavior of soil. The aim of this paper was to investigate the performance of soil physical properties data that was OILWAT model in the prediction of soil physical properties adapted from previous study in the Department of Agricultural and Bio-Environmental Engineering Technology. SOILWAT performed poorly in simulating volumetric moisture content, the equation of the line obtained is y = 0.0403x + 15.428, with the R˛ = 0.0274, the RMSE value is 4.21 which is quite large compare to the model’s ability to simulate bulk density and saturated hydraulic conductivity. When compared with the measured data, SOILWAT significantly simulated Bulk Density (BD) for Sandy loam and sandy clay loam soil having a perfect agreement between the observed and simulated values (R2 = 0.90, p<0.05; RMSE of 0.033 and regression equation given as; y = x – 0.33). The model significantly predicted the Saturated hydraulic conductivity, with R2 value of 0.92 and root mean square error (RMSE) 0.03, the equation of best fit obtained is y = x+0.21, since sample environment (confinement and overburden) are not represented in laboratory procedures, laboratory data may not always agree with field data.

Keywords: Soil properties, Soilwat, Bulk density, Overburden, field data







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