NASHUA, Iowa — Iowa State University Extension agronomist John Sawyer wants farmers to use the Corn Nitrogen Rate Calculator to fine-tune their nitrogen management. The calculator is a web tool that ...

The Iowa Legislature wants to spend $1 million next year to revise the state’s long-standing nitrogen fertilizer calculator used in seven corn-growing states. The money would be used to update the ...

A tractor is used to apply 32 percent liquid urea ammonium nitrate by dripping it onto the base of young corn plants in Northeast Iowa as part of a nitrate strip trial done by the Iowa Soybean ...

AMES, Iowa – The amount of nitrogen fertilizer needed to maximize the profitability of corn production in the Midwest has been increasing by about 1.2% per year for the past three decades, according ...

Mid-April is the ideal time to put out that first fertilizer application on lawns in North Florida. A newer trend in managing fertilizers while protecting the environment is the 4 R’s of nutrient ...