Red Dotted Lines in Fairways?

In some fairways there are some areas that are outlined with red dotted lines. These lines are indicators for the staff to have gone around and added a soil amendment after the aerification. This soil amendment helps retain moisture in the soil. Even after making numerous sprinkler head adjustments we still have not been able to maintain adequate soil moisture in certain areas. Therefore with the holes currently being open we took advantage of this time to add something to better retain moisture in these areas.