Fig. 4From: Effect of Senna obtusifolia (L.) invasion on herbaceous vegetation and soil properties of rangelands in the western Tigray, northern EthiopiaPercentage of functional groups based on the frequency of occurrence (G grass species, HL herbaceous legumes, NLHF neither grasses nor legumes) of the herbaceous vegetation under three S. obtusifolia invasion levels (NI non-invaded, LI lightly invaded, HI heavily invaded) at two locations in northern Ethiopia. Bars indicate the SE of the meanBack to article page