The Nitrogen Cycle

This video is a combined presentation by Mike Castellano, an Iowa State assistant professor of agronomy, and Matt Helmers, an Iowa State agricultural and biosystems engineering professor. Castellano presents information on the soil nitrogen cycle. Helmers discusses drainage and nitrate loss.


The purpose of the Iowa Nutrient Research Center is to pursue a science-based approach to nutrient management research through evaluating the performance of current and emerging nutrient management practices, and using an adaptive management framework for providing recommendations for the implementation of nutrient management practices and the development of new nutrient management practices.