Evaluation location: Wisconsin, United States
Lolium perenne, Visual rating of leaf blade width, just prior to the third cut in the fall. Data was taken on 1-to-5 scale and converted to 1-to-9 scale by Y=9(X)/5 To change 1-to-5 scale to mm use Y=2.0+1.2X. Thus 1 = 2mm or less & 5 = 8mm or more.