Aggregate dust is one of the threats to nearby agricultural operations, including cash and forage crops, a mushroom farm, and others. There is research that has shown that silica dust issuing from aggregate sites significantly reduces plant growth rates and coats crops like hay seriously affecting its value/use as fodder. The possible contamination of downstream surface and groundwater is a second issue that may have consequences for agricultural operations. Horse and livestock operations will also be affected by noise and vibration. Horse trainers have spoken at CRC meetings about the risks involved when standard-bred horses are spooked by noise and vibration resulting from blasts.