"If farmers are to consistently grow 300-bushel-per-acre corn or higher, we're going to have to do it in 12-in, 15-inch or 20-inch rows." – Marion Calmer
As the inventor of the world’s first single chain, 15-inch corn head in 1995, Marion Calmer has been a trailblazer in the Ag industry when it comes to narrow row corn and the equipment that harvests it. As the President of Calmer’s Ag Research Center, the largest independently funded, farmer-run Ag research center in the United States, Marion has conducted extensive research on various aspects of planting, growing and harvesting corn in narrow rows. Below is some helpful information for anyone interested in making the move to narrow row corn.
A Quote from Marion Calmer - Farmer, Researcher, and Inventor
"I have a passion for farming, and for improving the way I farm. I have farmed on my own since 1975, and I am always trying to become more profitable and environmentally friendly. I have found that narrow row corn is helping to achieve both goals. Bottom line: there is less soil erosion in the field, healthier plants, less weeds, better moisture and sunlight, and increased nutrient utilization. This ultimately results in higher yields, less chemicals, and more bottom line profit! I want everyone to learn the correct way to grow narrow row corn, and see that there really are significant and repeatable advantages! Please refer to the links below for detailed information on planting, growing, harvesting and researching narrow row crops or call me directly at (309) 368-1182."
- Planting Narrow Row Corn
- Growing Narrow Row Corn
- Harvesting Narrow Row Corn
- Researching Narrow Row Corn
The Bottom Line: Benefits of Growing Narrow Row Crops
Marion Calmer and Francis Childs
(Manchester, IA - World Record Corn Yield
441BU/AC - 20" Rows)
"All indications are that I should have
switched to 20" rows sooner!"
- Francis Childs
- More bushels per acre
- Less weeds
- Less erosion
- Plant and harvest faster
- Bottom line: more profit
In 15" and 20" rows, plant spacing become more uniform and as a result, reduces in-row competition between plants and improves sunlight interception.
|Row Width||Population||Average Plant Spacing|
|30" at||28,000||= 7.5"|
|20" at||28,000||= 11"|
|15" at||28,000||= 15"
Side-By-Side Yield Comparisons 30" vs. 15" Rows
Based on farmer conducted research and experience, proper implementation of these row spacings will provide significantly higher yields than those of traditional 30-inch or greater row spacings.
Myths of 15 and 20-inch Row Corn
|False||Research data from Texas actually shows a higher yield.||True||Research data from Texas actually shows a higher yield advantage to 15-inch corn rows over 30-inch than does University of Illinois research data. Argentina and Brasil are way ahead of the United States in the adoption of narrow row corn.|
|False||It takes a special hybrid to grow narrow row corn.||True||Premier hybrids in wide rows tend to be Premier hybrids in 15 and 20-inch rows.|
|False||Narrow row corn requires narrow tires.||True||Research from Ohio State indicates wider tires have a bigger footprint thus reducing compaction and increasing yields.|
|False||Seed costs increase in 15 and 20-inch rows due to higher populations.||True||Significant yield advantages have been documented even when both row spacings are compared at the same population.|
|False||The yield advantage of 15 and 20-inch row corn is minimal.||True||In 394 side-by-side farmer field trials, 15-inch row corn outyielded 30-inch row corn by an average of 12.3 bushels per acre.|
Hear Marion discuss his progression toward solid seeded corn over the years and explain why he sees the industry continuing to move toward narrower rows in the future.