Lawn problem

Hello ,

For the first cutgrass you must to mow the thrid of the height's lawn there are some rules when you use your lawnmower and the lawnmower's blade must cut well the cut must to be clean and it's very important if you want a perfect lawn

i hope than you have understood my English because i'am french and i'am on continuting education adult for be landscaper and i know my lesson
thank