improved technology and resulting increases in farm production
75-90 labor-hours required to produce 100 bushels of corn (2-1/2 acres)
35-40 labor-hours required to produce 100 bushels (2-1/2 acres) of corn with 2-bottom gang plow, disk and peg-tooth harrow, and 2-row planter
with walking plow, harrow, and hand planting
About
commercial fertilizer: 6,845,800 tons
commercial fertilizer: 6,599,913
15-20 labor-hours required to produce 100 bushels (2-1/2 acres) of corn with 2-bottom gang plow, 7-foot tandem disk, 4-section harrow, and 2-row planters, cultivators, and pickers