uncultivable
1. [ adjective ] not suitable for cultivation or tilling
Synonyms: uncultivatable
Examples:

"thickets of indigenous trees...on uncultivable land"- C.B.Palmer

Related terms: uncultivated
Similar spelling:   uncultivatable
  uncultivated
  unscalable
  unsullied
  uncultured
  unsolvable
  unqualiied