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. Rice-wheat, Rice-barley, Rice-chickpea, Rice-lentil in sub plot. In the present study, no significant effect was observed across fertigation regimes and cropping systems in the soil moisture characteristics because soil moisture characteristics curve is more strongly affected by soil texture and physical conditions. The average soil moisture contents (v/v) at field capacity and at permanent wilting point were 33.73 % and 9.56 % respectively.

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