oldfields

Customarily, these marginally productive oldfields are lightly stocked or are "improved" with exotic forages requiring fertilization to realize maximum productivity.

Texas blackland prairies 2008

As nearly all the lands of lower Virginia had been thus treated, and in succession had reached this second growth, which thus covered all the then poorest and most worthless lands, a general cover of pines, and the term "pine oldfields," came to be generally understood as indicative of the poorest and meanest of lands.

Agricultural, Geological, and Descriptive Sketches of Lower North Carolina, and the Similar Adjacent Lands 1861