Cannot pickup TMR from Cow Barn floor

[FarmerMuprhy]

Hi all,
I was mixing TMR and without knowing exactly where to place it I spread it along the front of the cow barn in where the cows are. Is there a way to pick it up, when I go at it with a loader it just bounces off the TMR as though it has a collision.

Any ideas would be appreciated as it causing quite a bit of trouble,