Australian biofuel company, PhytoFuel, is considering the use of the Kalpa tree (a tree native to Australia and resembling wisteria) as an alternative biodiesel feedstock. Company CEO, Marshall Mackay, says that the Kalpa tree produces a non-edible nut, with a seed of high oil content (about 30% oil yield). The oil is said to be suitable for making biofuel. The Kalpa tree is also a relatively robust tree, stress tolerant (with respect to high salinity and low water), suitable for warmer climates, and easy to maintain. Field trials for growing the trees are set (in preferably stressed areas in) Katherine and in the Daly river region. According to research, the first harvest of the kalpa tree will be five to six years after planting, and trees are expected to reach maturity by the tenth year. When the trees reach maturity, it is hoped that local producers would be able to harvest the nuts and sustainably process these into biofuels..