Proceedings of the Annual Congresses of the Grassland Society of Southern Africa · 1968 · 13 citations · 0 references
Natural ResourcesBotanyPlant SciencesForage ProductionGrazing ManagementSilvicultureCrop CompetitionGrazing EcologyGrazing PressureBasal CoverCompetitive Interactions Between Herbaceous VegetationGrass CompetitionGrass Cover AssessmentGrazing Effects On CompositionGrazing Impact On Species CompositionGrazing Management EffectsHerbaceous Biomass Loss
Abstract In a large‐scale experiment a dense stand of A. karroo was effectively killed by a basal bark application of 2,4,5—T at a concentration of 1.5 per cent acid equivalent in paraffin. There was no correlation between density of Acacia and either composition or basal cover of the grass component. After three years there was still no significant difference in the grass cover and composition of paddocks on which A. karroo had been cleared, and uncleared ungrazed control paddocks. There was no evidence that where grazing was precluded a dense stand of A. karroo would develop and retard improvement in botanical composition. Despite the similarity in cover and composition, uncleared paddocks yielded significantly less grass than cleared paddocks, both in dry and in wet seasons. Total costs of bush clearing averaged R6.80 per morgen.