Blade plow, Residue Transect 3 

See the How-to video on the line-transect method, and the What is Residue video.
I did three transects on each of three cropping management and tillage systems. The transect counts are averaged for each system to find the percent residue cover.
The cord has 100 black marks on it; if a piece of residue is directly under the mark, count it. Since there are 100 marks, the count is the percent cover for that transect.