New shoots of A . This species has a unique capacity to produce moderately heavy seed crops from difficult, rocky sites, including those with a lateritic hardpan. A fast growing, multistemmed shrub or small tree from the semi-arid to subhumid zones of northwestern Australia, A. tumida has performed well in field trials in Niger, Burkina Faso and Senegal. This species is well adapted to infertile soils, including podzols, laterites and loose, drifting sands. Populations vary considerably in many characters, including plant habit, coppicing ability and seed size.
Acacia adsurgens .
It has been observed to produce heavy seed crops on infertile sands in southern Niger. In northern Australia, Juliflorae acacias set heavy seed when cumulative rainfall is at least 300 to 400 mm, especially when rain is concentrated towards the end of, or even after, the main rainy season. Clearly, these acacias are capable of producing a useful seed crop in years that are unfavorable to short-duration rainy season crops such as maize, millet or sorghum. There is little information on seed production in plantations. In northern Australia, predation by various insect pests, such as chalcid wasps, may cause considerable seed destruction.