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2015. Foulds, W.. 1978. Response to soil moisture supply in three leguminous species. I. Growth, reproduction and mortality.. New Phytol. 80:535-545..
The study compared white clover, birdsfoot trefoil, and black medic under conditions of high and low soil moisture. Black medic exhibited the most plasticity to moisture condition. On moist soils, it formed substantial vegetative growth and high numbers of seed. In drought conditions, it was the most tolerant at all growth stages, forming many seeds even when vegetative growth was low. Seeds per plant at high and low moisture were 80,000 and 3000 respectively. Competition by perennials during black medic seedling growth seriously inhibits the colonization of this species. Both the immature and adult stages of black medic show an effective avoidance of desiccation.