The combined effect of charcoal amendment and seeding depth was tested on soil properties and yield components of melon (Cucumis melo) at the botanical garden of the Peleforo Gon Coulibaly University of Korhogo. With the exception of the control plot, 6 kg of charcoal were applied by hand on ridges of 2.25 m2 in the first 10 cm of soil one month before sowing. The seeds were sown manually at 0.5 cm (control depth); 3 cm; 7 cm and 9 cm deep. The results showed that the application of charcoal significantly increased germination rate ((P˂ 0.002), growth (P ˂ 0.0001) and fruit yield (p = 0.0001). The combined effect of charcoal input and sowing depth was noticeable from the 47th day after sowing (P = 0.0001), the greatest values having been observed at a depth of 9 cm Correlated to the growth of the plants, the best fruit yields were obtained from the depths 9 cm with an average of 4 fruits per plant.
In order to domesticate Lippia multiflora for its perpetuation, study was carried out at the National Center of Floristics (CNF) of the University Félix Houphouët Boigny of Côte d’Ivoire. The objective of this work is to estimate the biomass of Lippia multiflora (Verbenaceae), called “savannah tea”, under the effect of urea diluted in water (fertigation) over time on a ferralsol in southern Côte d’Ivoire. The trial was set up in a completely randomized Fisher block design with three replications. Potted Lippia multiflora plants received two doses of urea T1 (0.5 g) and T2 (1 g) previously diluted 1 liter of water and a control treatment T0 without urea addition. The effects of these different doses on the growth parameters of Lippia multiflora were compared with each other using analysis of variance to assess the growth parameters of the plant. The observations were made on the average height of the plants in centimeters (cm), the average diameter of the stem, the average number of leaves and roots. From the results obtained, the contribution of urea influenced the growth of Lippia multiflora because different from those of the T0 control. It appears that the application of urea T1 (0.5 g) best promotes the growth of Lippia multiflora.
The environmental challenges in the context of climate change require the design of a sustainable organic agriculture. To achieve such a challenge, the use of organic fertilizers is highly recommended. Among these organic fertilizers, compost is of paramount importance as it is widely recommended and used in the agricultural world. However, the quality of compost depends on the organic matter used. The search for several sources of compost is necessary in order to offer several choices to producers, depending on the source of organic matter available. With this in mind, a study on the use of sawdust from carpentry by composting was conducted in the south of Côte d'Ivoire, in the commune of Marcory, with a view to its use for agronomic purposes. In a 2 x 1.5 x 1 m pit, 50 kg of fresh sawdust and 20 kg of chicken litter were composted over a period of 5 months. The mature compost obtained is in decomposed form (detritus), black in color, oily, free of pathogenic micro-organisms and with appreciable contents expressed in g/kg of assimilable mineral elements such as: N(28.8) K(19.2) Ca(04.5) P(03.1) and Mg(01.5). Its use as a substrate in soilless tomato cultivation has resulted in a yield of 0.75 kg per plant, compared to 0.20 kg per plant in full soil cultivation. This represents a yield of 45 t per hectare, compared to 11 t.
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