Response of hardwood tree regeneration to surface fires, western Chaco region, Argentina

Mean char height of three native tree species of the Chaco region at two dates of burning during the fire season: early (July-August) and late (September-October), 2008-09. References: Ziziphus mistol (dotted bars), Aspidosperma quebracho-blanco (full bars) and Schinopsis lorentzii (diagonal lines bars). La María' Experimental Ranch, Santiago del Estero, Argentina. Means with the same letter are not significantly different, t-test, α = 0.05; data rank transformed, means calculated by the LS Means procedure.