Just how close the spraying could get!!
Lincs Aerial Spraying Company at Boston Aerodrome in 1967.
Imagine working outdoors in the fresh air when all of a sudden this happens about 100 yards or so away from you. Health and Safety would have something to say about this today!!
This is the flag man who would show the pilot which strip to spray next, note the lack of protective clothing and breathing gear.
I'm more than sure that aerial spraying is banned now but the chemicals are still being put in by tractor.