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Science of lagging behind hysteresis in soil moisture characteristic curve - A review

The literal meaning of Hysteresis is to be lagged behind. In soil system, it is evident that the two soil moisture characteristic curves do not follow the exact same reversible path. As a result a hysteretic behaviour is experienced. Several causes may be attributed like non uniformity of pores, contact angle difference, entrapped air in pore space and the swelling and shrinking property of soil. To predict the hysteretic behaviour, several models defining the character were also suggested like Conceptual models and Empirical models. | Int.J.Curr.Microbiol.App.Sci 2017 6 10 151-156 International Journal of Current Microbiology and Applied Sciences ISSN 2319-7706 Volume 6 Number 10 2017 pp. 151-156 Journal homepage http www.ijcmas.com Review Article https doi.org 10.20546 ijcmas.2017.610.019 Science of Lagging Behind- Hysteresis in Soil Moisture Characteristic Curve - A Review Prithwiraj Dey1 Prerna Sundriyal1 and Sanjib Kumar Sahoo2 1 Department of Agronomy 2Department of Soil Science G.B. Pant University of Agriculture and Technology Pantnagar UK-263145 India Corresponding author ABSTRACT Keywords The literal meaning of Hysteresis is to be lagged behind. In soil system it is Hysteresis Soil evident that the two soil moisture characteristic curves do not follow the exact Moisture Curve same reversible path. As a result a hysteretic behaviour is experienced. Several Desorption causes may be attributed like non uniformity of pores contact angle difference Capillary hysteresis entrapped air in pore space and the swelling and shrinking property of soil. To Water retention. predict the hysteretic behaviour several models defining the character were also Article Info suggested like Conceptual models and Empirical models. Domain theories are the Accepted main theme of the conceptual models whereas the experimentally observed results 04 September 2017 are the basis of Empirical models. Soil moisture hysteresis plays a vital role in the Available Online understanding of the behaviour of soil as a porous media as well as it gives us idea 10 October 2017 to soil moisture retention and release characteristics. Introduction Soil water retention characteristics and release It has been found and described by Haines pattern in of utmost importance in agricultural Haines 1930 that the volumetric moisture science not only as because it provides content in soil in relation with a particular moisture to the plants for survival the soil suction or tension force is different depending moisture also has deciding role