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The effect of environmental factors and crop interference on the biology of yarrow (Achillea millefolium L.) seed and seedlings
(Lincoln College, University of Canterbury, 1983)
A population of 58 seedling yarrow (Achillea millefolium) plants m⁻² produced approximately 243,000 viable seeds per square metre in the first season of growth and development. Approximately 10% of the freshly harvested ...