Ontogeny and fire interact to affect competition between grass and shrubs

We investigated the effects of fire, grass and acacia age on relative growth rate (RGR), neighbour effect (RNE), height biomass in greenhouse condition. The experiment was arranged a completely randomized design with 10 replicates. Grass shrubs were grown 17 weeks after establishment, thereafter, fire applied, observations done 16 later. Old tussock suppressed seedling sapling, but young facilitated sapling. Young older mature tussocks. After remove application there no significant all seedlings negatively affected by grasses In contrast to acacia, tussocks reduced above ground biomass.