Comportement du manioc en fonction des dates de plantation et de recolte.
1981
Ezedinma F.O.C. | Ibe D.G. | Onwuchuruba A.I.
Growth and yield of cassava at different times of planting and harvesting were studied in replicated trials at Nsukka, Nigeria. In the first experiment, cassava planted on 14 September 1973 was harvested at fortnightly intervals beginning at 9 months until 13 months after planting. Yields of stakes and commercial roots showed significant increases up to the eighth harvesting at about 12 months and declined thereafter. In the second experiment, planting was done every fortnight beginning 6 June and ending 9 October, 1974. A third experiment investigated the period 13 August - 15 October in weekly plantings. All the plants of the second and third experiments were harvested at 12 months after planting and the yields of roots, stems, stump (old stalk), and number of leaves at harvest were compared. The highest weight of roots was obtained from the June, late July to early September plantings, and the number of roots followed similar trends. Stump weights were highest from the June and late August to September plantings. The reduction in number of roots was not significant. Significantly higher dry-matter yields were obtained from the September plantings - a finding that suggests the best time to plant cassava is during the late rather than the early cropping season. The results are discussed in relation to ambient weather conditions during the experimental period.
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