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If you mean ruts, that would indicate depressions in the soil, as in wheel ruts... rots would be decaying and black... yellow streaks are most likely caused by running the mower over heat stressed turf and they eventually go away with water... if the damage isnt too severe...
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Well reasoned rational thought is the ONLY way to prove or disprove anything, rather than the foolish insults of those incapable of putting together the thought processes necessary to accomplish conclusions... 
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