Randy Dowdy calls the corn plant a factory and the root system its receiving department—and this spring, Dowdy’s factory opened for business in just six days. The benchmark is one he and fellow high-yield grower David Hula say is critical for top-end yield.
“The crop came up in six days,” reports Dowdy, who farms in Brooks County, Ga. “I planted at 2.5” to 2.75” to try and maintain a full 2-inch germination depth. The weather cooperated. The forecast was accurate. And now we’ve got some really good root development below-ground.”
As temperatures dropped to around 32°F and hovered 10 or so days after planting, Dowdy admitted he was “pessimistically optimistic” about potential yield drag. The corn growing point was still safely below ground, so outright loss of the crop wasn’t his concern. What he wanted to know was a bit subtler: How much yield can cold weather take “off the table” when a crop is just getting started?
That question is at the heart of why uniform, rapid emergence matters so much to Dowdy and Hula. Both men argue that if you’re serious about corn yields and return on investment, the first 10 days after planting are critical.
“We’ve never had high-yielding corn when it’s taken more than 10 days for corn to come out of the ground,” says Hula, who farms near Charles City, Va. “You’ve got to realize that in that six-day event when that crop is just coming out of the ground, it’s not using any excess energy.”
That’s important, Hula contends, because the seed only has so much internal energy to work with.
“We say corn’s got enough seed energy to get to V3,” he says. “But if it’s sitting in the ground for so long, it’s burning too much energy. Then, when it comes out and starts photosynthesizing at V3, we’ve already lost some of that energy. With quicker emergence, like Randy had, we don’t lose that energy.”
The takeaway Hula and Dowdy tell farmers to keep in mind is three key things: plant into fit conditions, favor warming trends in the forecast and respect soil temperature.
Stay Focused On Doing The Basics Well
“Everybody’s ‘fit’ is different,” Hula acknowledges. “But warm soil and warming trends—back to the basics—that’s where it starts.”
Keeping the basics in mind, Dowdy says he saw them come together to deliver even emergence of his corn crop.
“We’ve been taking some pictures, and we’ve got some really good root development,” he says. “Some of the things we’re doing in the furrow and 2 x 2 seem to be paying off. We’re building a tremendous root system as we speak.”
Dowdy is unapologetically fixated on roots. It’s a major reason he is careful about buffering the salt load in the furrow to protect fragile root hairs on the corn.
“We’re trying to make sure that we’re not pruning any of those fine root hairs and root development, especially when that plant’s transitioning from seed energy to root uptake,” Dowdy reports.
He says that transition coincides with one of the most critical windows in corn development: the rows around determination.
“People say, ‘How important are the early roots?’ Critical,” Dowdy says. “At V3 to V4 is when rows around are being determined—when they’re being initiated. What that root system does early on is a big deal.”
He uses a simple analogy to drive the point home.
“The plant is a factory and its root system is the receiving department. The larger it is, the more shipments it can take,” notes Dowdy, who says he heard the analogy from another farmer.
Evaluate In-Furrow Products Carefully, Prevent Burn
Hula says he has watched too many growers lean on “traditional” in-furrow products without understanding the long-term potential tradeoffs for root health—especially in dry or marginal soil conditions.
“[Some farmers] talk about using 10-34-0 in the trench as starter. Clearly that’s a cheaper form of fertilizer. If they looked at what they were doing compared to a low-salt program, they might see they’re not getting the full benefit.”
On Hula’s farm, 10-34-0 has largely been replaced by low-salt in-furrow products designed to enhance nutrient uptake and support early root development.
“We don’t even use 10-34-0,” he says. “We use a product like Relay in the trench, which is just kind of enhancing the plant’s ability to extract that phosphorus from the soil, with some other beneficial things—zinc, humic acids—mixed in. We see that root development.”
The danger with starters containing a significant amount of salt becomes painfully clear, he adds, when conditions turn dry.
“In the Delta, I’ve seen guys use 10-34-0 in the trench and dry-seed their crop,” Hula says. “They end up replanting because of the salt load in there.”
Dowdy echoes that concern, which is why buffering salt in the furrow is a central part of his program. Both men argue that in today’s cost and yield environment, the “cheaper” product in the box isn’t always cheaper when you factor in stand loss, root pruning and replanting.
Corn growers across the country will face their own versions of cold snaps, wet soils, dry planting windows, and various input decisions this season. But Dowdy and Hula emphasize one principle stands above the noise: If you want top-end corn yields, the crop has to start fast, even and strong. Everything else—biology, nutrition, crop protection—builds on that foundation.
Listen to Hula and Dowdy’s recommendations detailed during their recent Breaking Barriers With R&D discussion on AgriTalk here.
