Typical square bale will weigh between 60 to 120 pounds depending on moisture content and density of material in the bale. Yields of hay very greatly from .05 to 6 ton per acre. Given an average weight of 80 lbs. per bale and average yield of 2.0 ton per acre, one could expect to yield 20-25 square bales per acre.
One
An acre is 43,560 square feet. Most small square bales would lightly cover at least 2x10 ft, but more likely 2x15 ft . Therefore; 43,560 divided by 30 (if each square bale covers 30 sq/ft as an average) = 1,452 square bales. If the bales are larger (round bales), obviously fewer bales would be required. Large round bales would likely provide at least 10X the coverage so likely in the range of 145 round bales
That all depends on the size and type of bales you have, as well as the forage biomass of that field. Bales come in not just one size, they come in small square, large square, small round and large round bales. Forage biomass is also different from year to year, depending on current seasonal conditions (moisture, sunlight, soil) for your area.
There are about 4,046.9 square meters in one acre.
43560 square feet in one acre.
1 acre = 43,560 square feet
The number of bales that are produced per acre varies a lot by area, soil conditions, type of cotton, and weather conditions. For instance, in Lubbock, Texas in 2012, cotton production varied from 1/2 bale per acre to 4 bales per acre. The higher yields came from fields that were irrigated.
43,650 square feet in one acre.
There are 4,047 square meters in one acre.
1 acre = 0.004 square kilometers.
1 acre = 4,046.85642 square meters
4,840 square yards equals one acre