What will an acre of farm ground produce?

From The Crop Production 2021 Summary 01/12/2022 (usda.gov)

Corn for grain production in 2021 was estimated at 15.1 billion bushels, up 7 percent from the 2020 estimate. The average yield in the United States was estimated at a record high 177.0 bushels per acre, 5.6 bushels above the 2020 yield of 171.4 bushels per acre. Area harvested for grain was estimated at 85.4 million acres, up 4 percent from the 2020 estimate. (Over 9500 lbs of corn per acre)
Soybean production in 2021 totaled a record 4.44 billion bushels, up 5 percent from 2020. The average yield per acre was estimated at 51.4 bushels, up 0.4 bushel from 2020. Harvested area was up 5 percent from 2020 to 86.3 million acres
All wheat: Production totaled 1.65 billion bushels in 2021, down 10 percent from the 2020 total of 1.83 billion bushels. Area harvested for grain totaled 37.2 million acres, up 1 percent from the previous year. The United States yield was estimated at 44.3 bushels per acre, down 5.4 bushels from the previous year.
 

Vegetables 2020 Summary 02/11/2021 (usda.gov)

Sweet corn: Total production in 2020 totaled 62.9 million cwt, down slightly from 2019. Planted area was estimated at 402,900 acres, down 1 percent from the previous year. Area harvested, at 386,200 acres, was down 1 percent from 2019. The value of the crop totaled $743 million, 14 percent more than the previous year. Utilized production totaled 62.7 million cwt, of which 15.1 million cwt was for the fresh market and 2.38 million tons were for processing.
Tomatoes: Total production in 2020 totaled 241 million cwt, up 1 percent from 2019. Planted area was estimated at 280,000 acres, down 1 percent from the previous year. Area harvested, estimated at 272,900 acres, was down slightly from 2019. The value of the crop totaled $1.66 billion, 4 percent more than the previous season. Utilized production totaled 239 million cwt, of which 12.6 million cwt was for the fresh market and 11.3 million tons for processing.
Head lettuce: Total production in 2020 totaled 40.7 million cwt, down 3 percent from 2019. Planted area was estimated at 114,000 acres, down 2 percent from the previous year. Area harvested, at 112,900 acres, was down 3 percent from 2019. The value of the crop totaled $1.25 billion, 12 percent less than the previous season. Utilized production totaled 40.7 million cwt, all of which was for the fresh market.
Ears of Sweet corn per acre: 1200 dozed - 14,400