I am planting some citrus trees, figs, brazillian cherry and custard apple. I was advised by a friend who studied permaculture to plant some legume trees with those to help fertilise the soil. I live out of Byron Bay at Ewingsdale Australia and i would like to know the name of some legume trees. I would prefere the trees to be small or similar size to the citrus. I would really appreicate if someone would advise me of some good tree names. Thank you.