To make large round hay bales, you need a large round hay baler. And in 1966, agricultural engineer Wesley Buchele invented one. March 18 th would have been Buchele’s 101 st birthday.

Large hay bales (generally round): Measure 5 feet wide by 6 feet in diameter (1.5 × 1.8 meters) while weighing around 1,500 pounds (680 kilograms). How many small square bales per acre?

Square bales of Tifton 85, a higher grade of hay suitable for horses, sells for as much as $9 a square bale. The larger round bales sale for $40 to $60 a piece.