Main line at research plothttps://www.ag.ndsu.edu/news/newsreleases/2008/aug-21-2008/ndsu-starts-tile-drainage-research-project/main-line-at-research-plot/viewhttps://www.ag.ndsu.edu/news/newsreleases/2008/aug-21-2008/ndsu-starts-tile-drainage-research-project/main-line-at-research-plot/@@download/image/2008-08-21.3401741918
