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Skamarock, W.C, Klemp, J.B., Dudhia, J., Gill, D.O., Barker, D.M., Duda, M.G., et al. (2008) A Description of the Advanced Research WRF Version 3, NCAR Technical Note, Mesoscale and Microscale Meteorology Division. National Center for Atmospheric Research, Boulder, Colorado, USA.

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• TITLE: An Assessment of Potential Economic Gain from Weather Forecast Based Irrigation Scheduling for Marginal Farmers in Karnataka, Southern State in India

  AUTHORS: Rakesh Vasudevan Nair, Ramesh Kalidas Vasanthakumar, Eeanki Venkata Surya Prakasa Rao

  KEYWORDS: Agro-Advisories, Economic Assessment, Environmental Benefits, Irrigation Scheduling, Weather Forecast Models, Weather Informatics

  JOURNAL NAME: Agricultural Sciences, Vol.12 No.5, May 20, 2021

  ABSTRACT: This study is aimed to assess the usefulness of weather forecasts for irrigation scheduling in crops to economize water use. The short-term gains for the farmers come from reducing costs of irrigation with the help of advisory for when not to irrigate because rain is predicted (risk-free because the wrong forecast only delays irrigation within tolerance). Here, a quantitative assessment of saving (indirect income) if irrigation is avoided as rain is imminent (as per forecast), using a five-year archived forecast data over Karnataka state at hobli (a cluster of small villages) level is presented. Estimates showed that the economic benefits to the farmers from such advisories were significant. The potential gain in annual income from such forecast-based irrigation scheduling was of the order of 10% - 15%. Our analysis also indicated that the use of advisory by a small percentage of more than 10 million marginal farmers (landholding