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Simple water-balance models for simulating moisture, salinity and sodicity profiles in soils under wheat

Published online by Cambridge University Press:  27 March 2009

R. Pal ,
A. K. Kapoor ,
S. R. Poonia  and
M. Raj
R. Pal
Affiliation:
Department of Soils, Haryana Agricultural University, Hisar 125004, India
A. K. Kapoor
Affiliation:
Department of Soils, Haryana Agricultural University, Hisar 125004, India
S. R. Poonia
Affiliation:
Department of Soils, Haryana Agricultural University, Hisar 125004, India
M. Raj
Affiliation:
Department of Soils, Haryana Agricultural University, Hisar 125004, India
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Summary

Experiments were conducted in wheat planted in microplots at Hisar and Sirsa in Haryana state, India, to observe and simulate the depth distribution of moisture content, electrical conductivity in 1:2 soil-water extract (EC 1:2), and exchangeable sodium percentage (ESP) of soils after irrigation with water of high electrical conductivity (12–19 dS/m) and sodium adsorption ratio (20–80 (mmol/1)0·5). The three simulation models used differed in the procedure of estimation of evapotranspiration (models I and II, Reddy 1983; model III, Arora et al. 1987). In general, the means of the experimental moisture content profiles decreased and those of EC 1:2 and ESP increased with irrigation at both locations. Statistical analysis showed an overall good agreement between the experimental and simulated values of moisture content, EC 1:2 and ESP; the accuracy of simulation of the models followed the order model II = model III > model I, for moisture content and EC 1:2, but was identical for ESP.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 115 , Issue 2 , October 1990 , pp. 163 - 172
Copyright
Copyright © Cambridge University Press 1990

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References

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