From rainfed agriculture to stress-avoidance irrigation: II. Sustainability, crop yield, and profitability

Giulia Vico, Amilcare Porporato

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

The optimality of irrigation strategies may be sought with respect to a number of criteria, including water requirements, crop yield, and profitability. To explore the suitability of different demand-based irrigation strategies, we link the probabilistic description of irrigation requirements under stochastic hydro-climatic conditions, provided in a companion paper [Vico G, Porporato A. From rainfed agriculture to stress-avoidance irrigation: I. A generalized irrigation scheme with stochastic soil moisture. Adv Water Resour 2011;34(2):263-71], to crop-yield and economic analyses. Water requirements, application efficiency, and investment costs of different irrigation methods, such as surface, sprinkler and drip irrigation systems, are described via a unified conceptual and theoretical approach, which includes rainfed agriculture and stress-avoidance irrigation as extreme cases. This allows us to analyze irrigation strategies with respect to sustainability, productivity, and economic return, using the same framework, and quantify them as a function of climate, crop, and soil parameters. We apply our results to corn (Zea mays), a food staple and biofuel source, which is currently mainly irrigated through surface systems. As our analysis shows, micro-irrigation maximizes water productivity, but more traditional solutions may be more profitable at least in some contexts.

Original languageEnglish (US)
Pages (from-to)272-281
Number of pages10
JournalAdvances in Water Resources
Volume34
Issue number2
DOIs
StatePublished - Feb 2011

All Science Journal Classification (ASJC) codes

  • Water Science and Technology

Keywords

  • Crop yield
  • Irrigation
  • Profitability
  • Rainfall variability
  • Stochastic soil water balance
  • Sustainability

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