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Contribution to the optimization of fertilizer application to Hibiscus cannabinus II. Assay of monitoring of nitrogen nutrition

, : Contribution to the optimization of fertilizer application to Hibiscus cannabinus II. Assay of monitoring of nitrogen nutrition. Proceedings, VIth International Colloquium for the optimization of plant nutrition Volume I: 53-60

In field trials in Burkina Faso Hibiscus cannabinus was sown on 15 June or 15 July and levels of nitrogen in leaf laminae and petioles were measured. The pattern in leaf blades did not vary markedly with sowing date but that for petioles did. In trials in 1982-83 at Montpellier, France, crops were given 16-200 kg N/ha and yields ranged from 62.4 to 74.9 t/ha. Mineral nitrogen levels in leaf blades and petioles were measured at 34-96 days after sowing.

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