I have been approched by a school district to repair a football field. It has many areas that are bare or very thin. I have a Mataway overseeder. How should one approach a job like this? Do you overseed the damaged areas or try to overseed the whole field? What would be the best type of seed to use in this application? I have from March to about August for the repair to remain unused, then the field will be used heavily. Thanks for your help.