Corn Rowing is found in many cut pile carpets. Much like the effect of wind on a corn field, corn rowing is the effect of traffic bending rows of yarn tufts over filling voids in between the rows, leaving the surface with a ribbed effect. The width of these lines will vary depending on carpet pile height and density.
Corn rowing can be most effectively managed by accelerated maintenance procedures.
Vacuum cleaners should have revolving brush/beater bar.
Pile lifting with Pile Lifter will do a better job.
Raking with a carpet groomer parallel to the ribs will help a great deal.
This condition once it has developed will likely re occur as it is often due to under specified carpet.