Control corn input costs beyond planting
The Indiana Certified Crop Adviser panel includes Gene Flaningam, Flaningam Ag Consulting, Vincennes; Carl Joern, Pioneer, Lafayette; Greg Kneubuhler, G&K Concepts, Fort Wayne; and Dan Quinn, Purdue University Extension corn specialist, West Lafayette.
My goal is to keep input costs down on corn this year. Once corn is planted, are there still decisions I can make to limit input costs without sacrificing yield?
Flaningam: Review your soil fertility levels. Fields with medium-to-high phosphorus and potassium levels can have reduced broadcast fertilizer applications. If phosphate prices remain high, look at adding phosphate fertilizer to your corn starter program, allowing you to skip a year in broadcasting dry phosphate fertilizer. The goal is to enhance the plants’ root development and yield. We are not trying to provide fertilizer removal needs with starter alone. Review fungicide programs as well. Consider using generic fungicide formulations as a cost-saving measure. Always scout your fields before applying any product.
Joern: There are still plenty of opportunities to control input costs. Work with your trusted adviser to sort out which levers make sense on your acres.
Tighten up your herbicide program, scout instead of making prophylactic fungicide or insecticide applications, and confirm micronutrient deficiencies before you apply a blanket foliar feed.
Before sidedress, take an honest look at the real yield potential of the field. Sometimes using a nitrogen stabilizer like N‑Serve or Instinct makes more sense than throwing extra “insurance nitrogen” at the crop. Ask questions like: Will this dollar return differently on my high‑performing acres versus my stress acres? If you’re not confident in the answer, test it.
You should try something new on your farm every year, but not across every acre. Split a field, compare treated versus untreated, and let the data guide your decisions. Good on‑farm testing starts with good experimental design.
Kneubuhler: There are several management decisions to control input costs after planting. The largest opportunity is nitrogen management. Many growers can cut 20 to 40 pounds of nitrogen per acre in most years and especially in good mineralization years without affecting yield.
Fungicide is a cost that could potentially be eliminated if you have a hybrid with strong disease rating, are in a dry weather pattern or experience low disease pressure at R1. However, be cautious in cutting as it can be more costly to skip fungicide if it’s needed.
Cutting an herbicide pass or spot spraying could help. Don’t make an unnecessary trip just because you’ve always done it. Scout and make good decisions. Don’t get caught up in the buzz of doing all the foliars and biologicals. They can add up fast, so blindly using them is poor management. Use data to steer that decision.
Quinn: Yes, there are still opportunities to cut costs without giving up yield. Be selective and base in-season input decisions on actual field conditions rather than automatic applications. Many post-plant inputs such as fungicides, insecticides and foliar micronutrients are most likely to provide an economic return only when there is a clear need like confirmed foliar disease risk, significant insect pressure or documented nutrient deficiencies. If a field has little history of these issues and scouting does not indicate developing problems, skipping or delaying these applications can reduce costs. However, this approach depends on regular scouting and timely monitoring so that action can still be taken if conditions change.
Other products that often show inconsistent or highly variable responses, including plant growth regulators, biostimulants and many biological additives, are also logical places to cut. Across most environments, their yield benefits are less predictable than core agronomic practices. When budgets are tight, protect the fundamentals first.
