▁for ▁non - ed ible ▁veget able ▁oil ▁production . ▁ ▁P ong am ia ▁plant ations ▁for ▁b iod ies el ▁production ▁have ▁a ▁two - fold ▁environmental ▁benefit . ▁The ▁trees ▁both ▁store ▁carbon ▁and ▁produce ▁fuel ▁oil . ▁P ong am ia ▁grows ▁on ▁marg inal ▁land ▁not ▁fit ▁for ▁food ▁cro ps ▁and ▁does ▁not ▁require ▁nit rate ▁fert il izers . ▁The ▁oil ▁producing ▁tree ▁has ▁the ▁highest ▁yield ▁of ▁oil ▁producing ▁plant ▁( appro xim ately ▁ 4 0 % ▁by ▁weight ▁of ▁the ▁seed ▁is ▁oil ) ▁while ▁growing ▁in ▁mal n our ished ▁so ils ▁with ▁high ▁levels ▁of ▁salt . ▁It ▁is ▁becoming ▁a ▁main ▁focus ▁in ▁a ▁number ▁of ▁b iod ies el ▁research ▁organizations . ▁The ▁main ▁advantages ▁of ▁P ong am ia ▁are ▁a ▁higher ▁recovery ▁and ▁quality ▁of ▁oil ▁than ▁other ▁cro ps ▁and ▁no ▁direct ▁competition ▁with ▁food ▁cro ps . ▁However , ▁growth ▁on ▁marg inal ▁land ▁can ▁lead ▁to ▁lower ▁oil ▁yields ▁which ▁could ▁cause ▁competition ▁with ▁food ▁cro ps ▁for ▁better ▁soil . ▁ ▁J atro pha ▁ ▁Several ▁groups ▁in ▁various ▁se ctors ▁are ▁conduct ing ▁research ▁on ▁J atro pha ▁cur cas , ▁a ▁poison ous ▁shr ub - like ▁tree ▁that ▁produces ▁se eds ▁considered ▁by ▁many ▁to ▁be ▁a ▁vi able ▁source ▁of ▁b iod ies el ▁feed stock ▁oil . ▁Much ▁of ▁this ▁research ▁focus es ▁on ▁impro ving ▁the ▁overall ▁per ▁a cre ▁oil ▁yield ▁of ▁J atro pha ▁through