unfertile

bleak, inhospitable, lifeless

uncultivable, untillable

bankrupted, consumed, debilitated, depleted, diminished, drained, dried-up, enfeebled, exhausted, expended, lessened, reduced, spent, used up

arid, desert, droughty, dry, rainless, sere (also sear), thirsty, waterless

baked, dehydrated, parched, sunbaked