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Flood-tolerant rice reduces yield variability and raises expected yield, differentially benefitting socially disadvantaged groups.

  • Author(s): Dar, Manzoor H
  • de Janvry, Alain
  • Emerick, Kyle
  • Raitzer, David
  • Sadoulet, Elisabeth
  • et al.

Published Web Location

https://doi.org/10.1038/srep03315
Abstract

Approximately 30% of the cultivated rice area in India is prone to crop damage from prolonged flooding. We use a randomized field experiment in 128 villages of Orissa India to show that Swarna-Sub1, a recently released submergence-tolerant rice variety, has significant positive impacts on rice yield when fields are submerged for 7 to 14 days with no yield penalty without flooding. We estimate that Swarna-Sub1 offers an approximate 45% increase in yields over the current popular variety when fields are submerged for 10 days. We show additionally that low-lying areas prone to flooding tend to be more heavily occupied by people belonging to lower caste social groups. Thus, a policy relevant implication of our findings is that flood-tolerant rice can deliver both efficiency gains, through reduced yield variability and higher expected yield, and equity gains in disproportionately benefiting the most marginal group of farmers.

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