In general, field sampling to determine residue cover involves selection of a set of sampling locations and then evaluation of cover at these locations. The line transect this type of method. Ground cover is evaluated at points along a line. This procedure is valid provided that a sufficient number of points are observed and that they are separated by a reasonable distance. Points do not necessarily have to be of uniform separation.
Random intervals are equally valid, although less convenient.
The line transect is simply a convention to observe a number of points. Ground cover is determined by counting the number of points that intersect residue. Points must be finite in comparison to the size of residue. The Procedure Using the method involves laying a line and inspecting the selected points along the line. This can be accomplished with a variety of tools.