If the burned out areas are higher than the rest of the plot they would be drier, if they' re lower than the rest of the plot they could show pH problems/salt accumulations. Since deer can' t bite their food they tear it. Check the stems of the clover plants to see if it looks like it was pulled apart (jagged). This will let you know whether deer were the problem.

Did you test the pH before you planted?

Dan O.