Wiktionary
uncultivable
a. Not capable of cultivation
WordNet
uncultivable
adj. not suitable for cultivation or tilling; "thickets of indigenous trees...on uncultivable land"- C.B.Palmer [syn: uncultivatable]
Usage examples of "uncultivable".
The green was broken up and set off by irregular slashes of Barrayaran native red-brown, in the ravines and creek bottoms and along uncultivable slopes.