The Cash Rents Survey estimates have been published by the National Agriculture Statistical Survey Office. Survey responders reported an average cropland rental rate of $76/acre across the state ranging from $46 an acre on average for pasture; $66/acre on average for non-irrigated cropland; and $128/acre on average for irrigated cropland. The link to the data is:
https://www.nass.usda.gov/Surveys/Guide_to_NASS_Surveys/Cash_Rents_by_County/
State average cash rentals by year: Url shortener: 2021 Cash Rents by State NASS Data
County level by year cash rental rates: Url shortener: Past Year’s Cash Rents NJ NASS