Spraying Vitamin C?

Walking the dogs along the drive just past the culvert headed east when I noticed that a large helicopter flying W-NW at just over 1,000 ft accompanied by 4 smaller planes was spraying something. Whatever it was it was clearly visible, whitish, and sprayed in the form of a puffy cloud rather than a stream. Earlier this morning while in Marianna, I observed one or two jets spraying chemtrails at about 30k ft, so we'll probably have rain with the next day or two. The helicopter pilot may have seen me, because when I waved to them the helicopter, followed by its entourage, veered sharply north to fly over the house. I suspect that whatever was discharged wasn't the typical chemtrail mix.