Attachment 142818 I counted 15 houses less than 30' feet from this field. Some houses had swing sets even closer. Glad I don't live near this guys farm. It looks like they are planting tobacco. So it's pre pesticide and herbicide then they spray every week until harvest.
This is normal we spray all the time and these signs are posted it is for certain chemicals,they have a reentry period and these signs let people know what the chemical is and his long that period is.