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The Braun-Blanquet technique, complimented by TWINSPAN, was used for a phytosociological classification of the study area. Thirteen plant communities were recognised and described. A hierarchical classification is suggested and each community is related to its particular environmental characteristics

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Genetic advances in six important traits in the ground nut, including resistance to C. elegans, were determined in field trials conducted at the Vaalharts Research Station during 1988/89 using a randomized block design. Results indicated that significant genetic advances for the traits are possible. Breeding lines with resistance to C. elegans were identified. There were also improvements in yield and grading quality characteristics. Furthermore, it was indicated that direct selection on the primary character should be used in selecting for improved resistance to C. elegans, but that yield and grading quality could be improved by using as selection criteria both the primary character and indirect selection of the related secondary characters. Veldproewe is gedurende 1988/89 te Vaal harts Navorsingstasie volgens 'n ewekansige blokontwerp uitgevoer. Die genetiese vordering met seleksie vir ses eienskappe van grondbone word bepaal. Dit word aangedui dat betekenisvolle genetiese vordering van eienskappe moontlik is. T eellyne met genetiese weerstand teen C. elegans is ge"identifiseer; daarbenewens is vordering gemaak met opbrengs-en graderingseienskappe. Direkte seleksie op die primere eienskap is noodsaaklik indien vordering met weerstand teen C. elegans verlang word, maar pitopbrengs en graderingskwaliteit kan verbeter word deur die primere eienskap sowel as die verwante sekondere eienskappe te gebruik.