Free program will collect residual nitrogen data in key watersheds to help farmers optimize fertilizer application rates.

A project starting in central Iowa can help reduce fertilizer application, writes Iowa Agriculture Secretary Mike Naig.

Properly managing nitrogen is a challenge every year. Given the differences in rainfall amounts and timing, as well as soil temperatures and hybrids, what worked last year may well not work this year.

Iowa Secretary of Agriculture Mike Naig and the Iowa Nutrient Research & Education Council (INREC) today announced a new, ...