Protein nitrogen is the fourth form of nitrogen in a balanced fertility program. While the product provides a rapid and efficient supply of nitrogen and carbon, natural plant proteins also help other nutrient uptake, use and transportation inside the plant. Turf responds quickly to PRO N 10 applications, utilizing the nutrients where the plant needs it the most as determined by the plant at the time of the application. PRO N 10 also contains our proprietary Freshwater Algae Extract (UNI-MAX) which elicits even greater plant response.