The Collaborative International Dictionary of English v.0.48:

Uncultivated \Uncultivated\
   See cultivated.

WordNet (r) 3.0 (2006):

uncultivated
    adj 1: (of land or fields) not prepared for raising crops;
           "uncultivated land" [ant: cultivated]
    2: (of persons) lacking art or knowledge [syn: artless,
       uncultivated, uncultured]
    3: characteristic of a person who is not cultivated or does not
       have intellectual tastes; "lowbrow tastes" [syn: lowbrow,
       lowbrowed, uncultivated]

Moby Thesaurus II by Grady Ward, 1.0:

167 Moby Thesaurus words for "uncultivated":
   Gothic, Neanderthal, Philistine, acarpous, agrarian, animal, arid,
   arrested, backward, barbarian, barbaric, barbarous, barren,
   bestial, bookless, boorish, brutal, brutish, celibate, childless,
   churlish, cloddish, clodhopping, clownish, coarse, countrified,
   country-born, country-bred, crass, crude, deceived, desert,
   desolate, drained, dried-up, dry, embryonic, exhausted, fallow,
   farmerish, from the sticks, fruitless, functionally illiterate,
   gaunt, gelded, grammarless, gross, hayseed, heathen, hick, hicky,
   hobnailed, hoodwinked, ill-bred, ill-educated, illiterate,
   impolite, impotent, in embryo, in ovo, in the rough, ineffectual,
   inelegant, infecund, infertile, inurbane, issueless, jejune,
   leached, led astray, loutish, lowbrow, lumpen, lumpish, menopausal,
   misinformed, misinstructed, mistaught, native, natural,
   noncivilized, nonfertile, nonintellectual, nonproducing,
   nonproductive, nonprolific, outlandish, oversimple, pagan,
   primitive, raw, reductionistic, reductive, rough, rough-and-ready,
   roughcast, roughhewn, rube, rude, rudimental, rudimentary, savage,
   simplistic, sine prole, sterile, stunted, sucked dry, teemless,
   troglodytic, unblown, unbooked, unbookish, unbooklearned,
   unbriefed, uncivil, uncivilized, uncombed, uncouth, uncultured,
   uncut, underdeveloped, undeveloped, undomesticated, unedified,
   uneducated, unerudite, unfashioned, unfertile, unfinished,
   unformed, unfruitful, unguided, unhewn, uninstructed,
   unintellectual, unkempt, unlabored, unlearned, unlettered,
   unlicked, unliterary, unplowed, unpolished, unprocessed,
   unproductive, unprolific, unread, unrefined, unscholarly,
   unschooled, unsown, unstudious, untamed, untaught, untilled,
   untreated, untutored, unworked, unwrought, up-country, virgin,
   waste, wasted, wild, without issue, yokel, yokelish