John,
Have no idea, really. Usually credited to the double FW at TOC. In America, the single row quick coupler valves that comprised the first irrigation systems typically had 90 ft. radius, 180 ft./60 yard throw, and I think that kind of set corridor width back in the old days at about 60 yards, or a few yards less because the coverage is pretty weak at the far edges.
I was marking seed lines yesterday and recalled in my mind trying to ask here what a actual numeric width in yards does anyone consider "wide." I distinctly recall an early participant here claiming I was trying to "pin him down" and refusing to answer. LOL.
For the record, that one came out to a slightly disappointing 34 yards wide, but it sure seemed comfortable enough.
I usually think of 37-40 yards (fw) as the standard fairway, and about 42 yards as minimum "wide fairway. With multiple row irrigation, I would put wide tree to tree (or native to native) mowed play corridor as about 75 yards. Even at 66-70 yards, I find one of four golfers find the woods, but it drops off rapidly after that.
So, irrigation has actually allowed architect to get it wider.
Love the Clara Peller reference....especially apropos to adopt in the election season, since Walter Mondale used it once.