Soil moisture characteristics curve

The soil cohesion and angle of internal friction depend greatly on the soil moisture. Specifically, soil with a lower moisture content has a higher shearing strength than that in soil with higher moisture content. The finite element modeling of moisture transfers in unsaturated soils through the relationship between soil moisture, soil suction, unsaturated permeability and soilmoisture dispersivity is capable of accurately predicting the wetting front development.

13p nguaconbaynhay11 07-04-2021 24 1   Download

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.

6p gaocaolon9 22-12-2020 12 2   Download

Main objective of the study is to determine the importance of growing media physical properties, to assess the water holding capacity of the growing media and to determine the soil moisture characteristics curve for soil, soil + sawdust (2:1), soil + coirpith (2:1).

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Soil moisture is one of the important factor of soil that directly regulate the growth and development of plants. To manage the water scarcity problem during rabi season in south Bihar, we have to know the available water condition to supply optimum water for the crops. The soil is sandy clay loam, slightly alkaline in reaction (pH 7.3). The experiment has split plot design having three fertigation levels of nitrogen (W1=25% N, W2=50% N, W3=75%N of RDF) in main plot and 4 cropping systems i.e. Ricewheat, Rice-barley, Rice-chickpea, Rice-lentil in sub plot.

6p caygaocaolon4 04-04-2020 14 1   Download