With the arrival of the 2016 growing season comes questions about how to best manage nitrogen (N). This annually vexing problem never seems to get any easier because there are so many moving parts to the complex decisions regarding the 4Rs (Right place, Right time, Right rate, Right source) and N.
“I think we sometimes overlook that this is a very complicated system. The performance objective of N management is really important to consider. Is the goal to maximize yield, maximize economic return or minimize environmental loss? Sometimes these things do not go hand in hand,” said Josh McGrath, soil extension specialist with the University of Kentucky. “Sometimes we want to put out a positive story that if we minimize environmental loss, we also maximize economic return. That is not always the case. Sometimes you have to pick one as more important than the other. When you are at the economic optimum, your N losses might be higher than if you are taking an economic loss.… Continue readingRead More »