▁But ▁certain ▁rights , ▁names ▁or ▁associations ▁descend ▁mat ril ine ally . ▁ ▁Common ▁cro ps ▁of ▁trade ▁are ▁sugar ▁and ▁coffee . ▁Much ▁of ▁the ▁sugar ▁is ▁turned ▁into ▁" pan ela ," ▁a ▁type ▁of ▁Colomb ian ▁hard ened ▁brown ▁sugar . ▁The ▁women ▁do ▁most ▁of ▁the ▁plant ing ▁of ▁the ▁veget ables , ▁but ▁far ming ▁is ▁a ▁responsibility ▁of ▁the ▁whole ▁family . ▁ ▁Contempor ary ▁K og i ▁The ▁K og i ▁practice ▁agricult ure ▁using ▁slash - and - burn ▁far ming ▁methods ; ▁each ▁family ▁tends ▁far ms ▁at ▁varying ▁alt itudes ▁of ▁the ▁Sierra , ▁producing ▁different ▁cro ps ▁to ▁satisfy ▁the ▁range ▁of ▁their ▁needs . ▁They ▁also ▁raise ▁cattle ▁on ▁the ▁high lands . ▁ ▁See ▁also ▁Ar hu ac os ▁Juan ▁May r ▁T air onas ▁Alan ▁E re ira ▁ ▁References ▁ ▁Bibli ography ▁ ▁External ▁links ▁▁ ▁S ew al una ▁Foundation ▁T air ona ▁Heritage ▁Trust ▁National ▁Geographic ▁article ▁on ▁the ▁Indians ▁of ▁the ▁Sierra ▁Nev ada ▁Mountains ▁Sac red ▁Land ▁Film ▁Project ▁T ED tal ks , ▁W ade ▁Davis ▁on ▁end anger ed ▁cult ures , ▁the ▁K og is ▁at ▁ 8 ▁minutes ▁ 1 0 ▁seconds . ▁http :// ta ir ona . my zen . co . uk / index . php / c ulture / k og i _ rel ig ion _ and _ cos m ology / ▁ ▁" The ▁Sierra ▁Nev ada ▁Indians ". ▁Sur v ival ▁International