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Updated: Aug 5, 2025

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Sensor feedback system enables automated deficit irrigation scheduling for cotton.

Susan A O'Shaughnessy1, Paul D Colaizzi1, Craig W Bednarz2,3

  • 1Conservation and Production Research Laboratory, USDA-ARS, Bushland, TX, United States.

Frontiers in Plant Science
|March 27, 2023
PubMed
Summary

Automated irrigation systems can maintain cotton yield while saving water. The ISSCADA system offers a simpler alternative to manual deficit irrigation management in arid regions.

Keywords:
crop water stress index (CWSI)infrared thermometrysoil water sensingvariable rate irrigation (VRI)wireless sensor networks

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Area of Science:

  • Agricultural Engineering
  • Agronomy
  • Water Management

Background:

  • Precision irrigation technologies offer decision support for deficit irrigation (DI) strategies.
  • Limited research exists on sensor-based systems for DI management.

Purpose of the Study:

  • To evaluate the Geographic Information System (GIS)-based Irrigation Scheduling Supervisory Control and Data Acquisition (ISSCADA) system for managing cotton DI.
  • To compare automated ISSCADA methods with manual scheduling.

Main Methods:

  • Two-year study in Bushland, Texas, comparing ISSCADA-driven plant feedback (C) and hybrid (H) methods against manual (M) scheduling.
  • Irrigation levels: 25%, 50%, 75% replenishment (I25, I50, I75) of soil water depletion.
  • Manual method used weekly neutron probe readings.

Main Results:

  • Deficit irrigation at the I75 level maintained seed cotton yield across all methods while conserving water.
  • Irrigation savings ranged from 16% to 20% over two years.
  • Crop responses were statistically similar across automated and manual methods at equivalent irrigation levels.

Conclusions:

  • The ISSCADA system effectively supports deficit irrigation for cotton in semi-arid regions.
  • Automated scheduling simplifies DI management compared to labor-intensive manual methods.
  • Sensor-based systems like ISSCADA can optimize water use efficiency in agriculture.