How wide? How deep?

Understanding the influence of tile depth and spacing on nutrient loss – does depth or distance count for something?  Research under way by Dr. Rabin Bhattarai from the University of Illinois leads a study investigating how tile depth and spacing variations impact nitrogen (N) and phosphorous (P) losses. The study evaluates current tile drainage design and assesses negative impacts on tile drainage and N and P losses.  Click here to download a summary of his current research.  How wide, how deep – Bhattarai