Soil Water Index and Irrigation Depth?

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Is the soil water index a good indicator of available soil moisture resulting either from precipitation or irrigation depth?

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2 Answers

  1. What is the purpose to know the soil water index?  The factors that impact on moisture in soil are temperature, humidity, permeability, rate of percolation & green cover & evapo-transpiration.  It is good indicator to manage the irrigation for the crop.

  2. The Soil Water Index provides estimations on average amounts of water
    stored in soil of certain areas, helping to clarify the risk of landslide-related
    incidents caused by heavy rain. JMA uses index values as criteria for the
    issuance of Emergency Warnings, Warnings Advisories for heavy rain and
    Landslide Alert Information. Is not a good indicator of water availability for crops.