The overall land values considering all types of farm land is shown below in the following image.

Source: https://www.fb.org/market-intel/farm-inputs-u-s-agricultural-land-values-show-record-increase

Actual values depend on theb type of land. cropland if much more valuable than pasturland and some of the land used in these avarage numbers are exceptional farms.

Average Cropland Values in the United States by State

Pasturland Average Values by State

Source: https://www.nass.usda.gov/Publications/Todays_Reports/reports/land0822.pdf