University Extension specialists continue to stress the same thing that fertilizer companies stress in determining the nitrogen needed to grow a corn crop.

Recent soil tests and N calculators are invaluable tools that should be used. Guessing about how much N might be left in the soil and how much would be appropriate for application just doesn’t make sense in this day and age of precision farming with fields easily broken into management zones requiring different optimum fertilizer rates for producing a high-yielding corn crop.

It’s the job of crop consultants and ag retailer sales agronomists to get their customers to listen and follow reliable information about the appropriate N to apply.

Tim Hoskins, Iowa Farmer Today reporter, wrote an article quoting John Sawyer, Iowa State University Extension soil-fertility specialist, and using information supplied by the 360 Yield Center. The main contention is that “the drop in corn prices should not have a big effect on nitrogen rates.”

To read the article click here.