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Effects of planting dates and fertilization levels on seed production of some summer flowering annuals


, : Effects of planting dates and fertilization levels on seed production of some summer flowering annuals. Ann. agric. Sci, Cairo, 10: 2, 361-74. bibl. 14

Studies were made during 1960 and 1961 on the effects of 2 planting dates and 3 levels of a complete fertilizer on Tagetes erecta, Zinnia elegans and Cosmos sulphureus. Vegetative growth of T. erecta and Z. elegans continued for a longer period and the final plant size was greater with planting on 15 April than with planting a month later, and the seed yield was almost doubled with the earlier planting.

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