I would say 120 horsepower minimum... I know some people who pull 23 foot disc's with 130 horsepower tractor, but that was on plowed ground... but a 100 horsepower should do the job, at 4-5 mph
the first john deere 3130 had 89 horsepower with the last of them having about 95 horsepower according to the books but most them that tested had 100+ horsepower
Which tractor? There are MANY different models of John Deere TRACTORS.
A John Deere 350 Industrial tractor was rated at 42 engine horsepower and 30 drawbar horsepower.
A John Deere Model 50 had 20.62 drawbar horsepower and 26.32 belt horsepower for more info on the 50 visit http://www.tractordata.com/farm-tractors/000/0/3/35-john-deere-50.html
75 hp
95hp
A John Deere 8530 had 330 engine horsepower, 276.3 drawbar horsepower, and 312.7 maximum PTO horsepower.
36 horsepower at the PTO and 30 at the drawbar
400
Around 95 to 100.
145
the john deere x9 is the largest combine harvester in the industry it has 690 engine horsepower