AMES, Iowa – Iowa State University researchers weren’t looking for a slow-release fertilizer that could feed crops while protecting water quality, but they may have found one. Researchers looking to ...

Slow-release fertilizers, whether organic or inorganic, are less likely to leach into water. They keep nitrogen steadily available over a longer period of time, similar to a slow-release vitamin.

It has a fertilizer profile of 5% nitrogen, 3% phosphorous and 3% potassium. ... Best slow-release fertilizer: Osmocote Smart-Release Plant Food Plus.

A new 75,000-square-foot green ammonia fertilizer production and distribution facility is online in Boone, Iowa. The modular plant creates 82-0-0 anhydrous ammonia from air, sun, and water.