By Chelsea Clodfelder
A new Purdue Extension publication offers Indiana farmers tips on phosphorus applications by focusing on four simple principles.
The publication, Tips for Environmentally Friendly Phosphorus Applications in Indiana, is intended to help farmers better understand how and when to apply phosphorus fertilizers to their fields in a way that isn’t damaging to the environment.
"The fast and simple approach, such as broadcast P fertilizer application, is not the best approach environmentally,” said co-author Tony Vyn. "The dissolved P in all P fertilizers is water soluble and can become an environmental hazard under certain weather conditions following application to the soil surface with no incorporation.”
The tips correspond to the “4R Principles,” which are specific to Corn Belt cropping systems of differing tillage and crop rotations:
Right rate: Apply the correct rate of P fertilizers; test your soil, and only apply fertilizer where it’s needed.