Iowa | The Agro News

Wait for soil below 50 degrees: Iowa State's rules for autumn anhydrous ammonia

Iowa State nutrient specialist Richard Roth says fall-applied nitrogen only pays if it is still there in spring, and points growers to the N-FACT calculator and a free residual-nitrate sampling scheme limited to 250 fields.

Farm Progress17 September 20262 min read

Crops

Long-term cover crops gave an Iowa farmer 157 workable days against her district's 127

Practical Farmers of Iowa tracked suitable fieldwork days on 38 farms in four states in 2025: on average they matched USDA's figures, but fields with a decade of cover crops showed wider spring windows as Iowa loses one spring workday every six years.

Farm Progress14 September 20262 min read