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8429606 
Journal Article 
A preliminary report on the effect of acacia karroo competition on the composition and yield of sweet grassveld 
Du Toit, PF 
1968 
3 
1 
147-149 
English 
In a large‐scale experimenta 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 nocorrelation 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 grasscover 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. UITTREKSEL In ‘n grootskaalse proef is ‘n digte stand A. karroo doeltreffentmet ‘n mengsel van 2,4,5–T, teen 1.5 persent suurekwivalent in paraffienuitgegroei. Daar was geen korrelasie tussendie digtheid van die Acacia‐stand ensamestelling of basale bedekking van die graskomponent nie. Na drie jaar was daar steeds geen betekenisvolle verskille tussen diegrassamestelling enbedekking van ontboste en nie‐ontboste kampe nie. Waar kampevan beweiding onttrek is, was daar geen aanduiding dat ‘n digte stand A. karroodalk botaniese verbetering sou vertrag nie.Ten spyte van die ooreenkoms wat bedekking en samestellingbetrek, het nie‐ontboste kampe, beide in droë en in nat seisoene, betekenisvol minder gras as ontbostekampe geproduseer. Totale ontbossingskoste het gemiddeld R6.80 per morg bedra. © 1968 Francis Group, LLC.