DuPont (Pioneer Hi-Bred) and Syngenta developed the new varieties through traditional breeding techniques – with a little advanced technology thrown in to speed the process of picking which parent plants to try.

The duo’s entry into the world market could start decades of fierce competition for rain-challenged growers’ business. Biotech varieties in the pipeline for future release may have an even bigger impact than today’s hybrids, says Kraig Roozeboom, agronomist with Kansas State University Research and Extension.

“Either way, drought-tolerant corn could expand seed companies’ markets,” he says. “Continued expansion of corn acreage at the expense of other crops, such as wheat and sorghum, will mean greater corn seed sales – which is the most profitable sector of the seed market.”

Roozeboom adds that technology isn’t the only reason new-generation corns are arriving so fast, compared to the new offerings for other standard crops. The seed industry for some time has been making larger investments in improving corn yields, largely because corn has been generating more dollars to invest. Herbicide- and insect-resistant corn hybrids, for example, were earlier money-makers.

Market factors have been pulling agriculture toward increased corn production, Roozeboom explains. If nothing else, corn remains the primary base for U.S. ethanol manufacturing. World consumption of animal protein has been on the rise, too, increasing demand for feed grains.

The agronomist says that so far, the best ways to address those market forces are to:

  • Get more acres into corn production, including land that has been considered marginal, due to limited precipitation.
  • Reduce the risk of corn crop losses while also increasing average yields in water-limited production areas, such as central and western Kansas.

“Untimely rains or dry conditions can have a big impact in our state – sometimes causing substantial yield reductions or complete crop failures,” Roozeboom says. “Corn is more sensitive to the timing of rainfall than Kansas’ other major row crops.”

Annual rainfall in the state ranges from more than 40 in. in the southeast to an average 16 in. on the western border, he says.

Without timely rains, however, even southeast Kansas can have moisture problems, because during mid-summer, the shallow topsoils there can dry out in a couple of weeks. The area has dense clay subsoil that limits corn roots to a narrow band of topsoil. Other subsoils may have moisture, but crop roots can’t effectively reach them.

In contrast, much of western Kansas has deep silt loam soils with high water-holding capacity. So, despite the area’s sparse rainfall, successfully growing dryland corn is possible, so long as enough stored soil moisture is available to complement limited rainfall during the growing season.

Roozeboom says that as global temperatures continue to rise, on-going improvements in cropping systems may also be necessary to maintain and expand corn acreage and production. High-residue, no-till production systems have already been essential for the success of dryland corn in more arid environments. Cropping systems that conserve both water and soil will become ever more important for sustaining long-term production.

“Of course, moisture problems aren’t as big a worry for irrigated farms,” Roozeboom said. “However, irrigated farms with limited well capacity could also reduce their risks if the new-generation hybrids perform as advertised. Water is a scarce resource that is getting scarcer.”