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Aluminium (Al) tolerance of fourteen white clover (Trifolium repens L.) cultivars from eleven countries was compared in the greenhouse in the Wainui silt loam (Typic Dystrochrept) to which Al had been added at nine levels (0, 2.5, 5, 20, 50, 150, 250, 500 and 750 mg kg⁻¹ of soil) as Al₂(SO₄)₃ and incubated for 30 days. None of the white clover cultivars, including those either referred to as Al-tolerant, Dusi and Pathfinder, or from countries that have large areas of acid soils, El Lucero M.A.G, Bayucua, Bage and Zapican, showed greater Al-tolerance than 'Grasslands Huia' white clover. Subsequent screening for Al-tolerance can therefore be restricted to germplasm with wide agronomic adaptation.