Published Feb 21, 2019

Rotationally Raised, Episode 005: Planting II: Seed to Soil

By Practical Farmers of Iowa

With corn planters, uniformity in depth and spacing both within and between rows is a precise science. With small grains (at least in Iowa), equipment with that precision isn’t really available or affordable (we’re not talking about singulation in oats, for example). Most Iowa farmers are either using conventional or no-till drills, or broadcasting seed and then incorporating it. This week, we zero in on when to plant, how to deep to plant, and why having a firm seedbed is so important with small grains.

Seed to Soil

In this episode, “Planting II: Seed to Soil,” PFI members from around the state share their perspectives on planting date, seed bed preparation and planting depth. In general, everyone agrees that it’s important to get spring small grains planted as soon as possible. Depending on soil moisture conditions, that could be anywhere from early to mid-March in southern Iowa, to late March and early April in the northern half of the state.

“If the frost is out of the ground, and the topsoil is dry, it’s time to plant,” says Dan Wilson of Paullina, “we have put in oats when the snowbanks were still in the road ditches. If the soil conditions are right to plant, we’ll put them in. We just think the earlier the better.” The same is true for winter grains like winter rye, wheat or triticale. In that case though, the limiting factor is getting the summer crop harvested — usually soybeans — so you can get the small grain planted.

Ensuring you get the seed at the depth you want is also important. “Whenever you’re planting any crop, you have to get off the tractor and see where the seed is,” says Ron Rosmann of Harlan. “And with small grains like oats and barley, you need to be in the ground about 1-2 inches, that would probably be ideal.” Uniformity is another factor — when seeds are in the soil at about the same depth, they’ll be more likely to emerge at the same time and maintain uniformity throughout the year. Darren Fehr of Mallard says that thinking about field preparation is one way to accomplish that: “Typically we’ll field cultivate once, maybe twice. Generally, it’s just trying to get a nice, firm seedbed,” he says.

To learn more about small grains production in Iowa, check out Practical Farmers of Iowa’s small grains page. There, you can find research reports, production manuals, articles, blogs, conference presentations and more.


Watch the video version of this podcast

previous episode 004: Planting I, Calibrate to populate

next episode 006: Crop Protection; growth stages, fertilizers and fungicides