AS TRENDS move toward higher corn populations, many no-tillers are switching row widths from 30 inches down to 20 or 15.
Moving rows closer together generally increases yields, but in no-till it also increases the chances of residue buildup between the planter row units and limits your ability to add starter fertilizer openers.
Removing residue from the seedbed area and keeping good residue flow through the planter is essential to achieve uniform stands. Providing in-row starter fertilizer increases early plant growth and translates to higher yields and profitability.
Here are some tips on how to manage residue and provide starter fertilizer in a narrow-row system.
On our farm, when we considered which narrow-row spacing would help us better harvest moisture and sunlight, we also thought about how the new row spacing would affect our ability to manage the new system.
Planting no-till corn in 15-inch rows can create new management challenges. Cleaning the entire residue away from the planting area is almost impossible with 15-inch rows because there’s simply not enough room for the residue to flow between the planter’s row units.
In addition, planter gauge wheels generally won’t maintain proper seeding depths because they can’t fit between the previous year’s 15-inch crowns.
Staggered planting units, multiple planter unit bars and pusher units can improve residue flow, but in each of these 15-inch-row systems the row cleaners in the front row throw residue in the path of the back row.
The row cleaners on the back row…