According to a recent University of Missouri study examining more efficient watering strategies, sweet corn growers may be able to reduce irrigation water use while maintaining crop quality.
Researchers from the University of Missouri’s College of Agriculture, Food and Natural Resources and College of Engineering evaluated three irrigation methods to determine how water management affects sweet corn yield and quality. The project focused on identifying ways growers can improve irrigation efficiency without reducing sweetness or overall crop performance.
The study compared rainfall-only production, a weather-based irrigation scheduling method known as potential evapotranspiration, and a crop-specific evapotranspiration approach that adjusted irrigation according to the sweet corn plant’s growth stage and water demand.
Researchers found the rainfall-only system produced the lowest yields. They also determined the weather-based irrigation method often applied more water than the crop required.
The crop-specific evapotranspiration system produced the strongest overall results, according to the researchers. The method accounts for the crop’s changing water needs throughout development, including lower water demand early in the season and higher demand during reproductive growth stages.
“We saw a clear difference in plant water use,” said Noel Aloysius, an associate professor involved in the project. “When farmers rely only on weather to guide irrigation, they often apply more water than the crops truly need.”
Researchers also evaluated sugar content to determine whether reduced irrigation affected eating quality. The study found little variation in sweetness across the different irrigation treatments.
“We found little difference in sugar content across the different watering strategies, showing us that farmers can still conserve water while delivering a quality product that consumers expect,” graduate researcher Moussa Theodore Yatta said.
The research team said the findings could support broader efforts to improve precision irrigation systems and increase agricultural water-use efficiency.
Researchers plan to continue studying irrigation management under varying environmental conditions, including both wet and dry growing seasons. Future work will also examine soil moisture and crop response over multiple years.
Source: University of Missouri, "Less water, same taste: New approach helps growers produce sweet corn more efficiently"