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Abstract:
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(En)
Strains of Trifolium subterraneum subsp. brachycalycium were assessed. Ungrazed swards of some subsp. brachycalycinum strains produced reasonable seed yields compared with subsp. subterraneum on the sandplain soils, and compared with annual Medicago species on the alkaline mallee soils. On a sandy soil near Esperance, prevention of burr burial compared with covering developing burrs with sand drastically reduced the seed yields of both subsp. brachycalysinum and subsp. subterraneum, by reducing burr pro ction and seed weight. Seed yields of subsp. subterraneum were similar for soils with sand or loose gravel surfaces, because the burrs were able to bury in both sand and amongst the gravel. As determined in a diurnally alternating temperature oven (15
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