(1) Start tractor.
(2) Connect up mower,
drive to fields and cut grass.
(2) Drive back to the barn and disconnect mower.
(3) Connect tedder,
drive to the fields and fluff up grass.
(4) Drive back to the barn and disconnect tedder.
(5) Connect hay rake,
drive to fields and rake grass into windrows.
(6) Drive back to barn and disconnect rake.
(7) Connect baler,
drive to fields and bale hay.
(8) Drive back to barn and disconnect baler.
(9) Connect trailer
and drive to fields. Park.
(10) Walk back to barn.
(11) Drive telehandler
to fields and load trailer.
(11) Trailer is full. Drive tractor and trailer back to yard.
(12) Walk back to fields.
(13) Drive telehandler to yard and move bales from trailer to barn.
(14) Repeat as many times as necessary.
(15) Customers enjoying the finished product:
In the past it would take a big team of men and horses but with modern machinery you only need a few people, maybe just one depending on how many acres, and there's almost no physical exertion involved. It just takes a long time, and you only have a fairly small window to do it for best results.
If rain comes or is even forecast the window gets even smaller. You usually do two cuts a year in the UK, sometimes three, a few people do more. If you also graze on the field you might only do one.
Obviously this is done in the summer during the long days. I might work for 20 hours on the longest days. Have the radio on and sandwiches and drinks in a cold box. Some people have beer while doing it, like the old days.