Browsing by Author "Oyewusi TF"

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    Effect of compost extract processing parameters on the growth and yield parameters of Amaranthus and Celosia Vegetables
    (2021) Oyewusi TF; Osunbitan JA
    In an effort to provide a more affordable fertilizer alternative to farmers, the effect of compost extract processing parameters was investigated on the growth and yield parameters of vegetables. In order to extract nutrients from compost, composted chicken manure was steeped in a container of a predetermined water and subjected to three processing parameters (compost to water ratio, steeping time and water temperature) at different levels. The compost extract produced was used for production of Amaranthus and Celosia vegetables through fertigation by pot experiment in a screenhouse. The growth and yield parameters of the vegetables were determined using standard procedures. The results showed that highest values of growth and yield parameters were obtained in vegetables with fertigation of compost extract compared to the control. The three processing parameters of the applied compost extract significantly (p < 0.05) affected growth and yield parameters of both vegetables. The maximum growth and yield parameters for both vegetables occurred with fertigation of extract made under compost to water ratio of 1:3 when steeped for 72 h at 25 °C water temperature. Therefore, compost extract is well suitable for vegetables production.
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    Investigation into physico-chemical properties of compost extract as affected by processing parameters
    (2021) Oyewusi TF; Osunbitan JA; Ogunwande GA; Omotosho OA
    In a view to convert the abundant chicken manure generated which constitute environmental hazard into a more useful form, investigation was carried out on efficient extraction of nutrients from composted chicken manure into compost extract which will serve as an alternative to inorganic fertilizer. Chicken manure was co-composted with sawdust using a passively aerated composting method. The resultant compost was subjected to 3×3×3 processing parameters: compost rate (10, 15 and 20 t/ha), steeping time (24, 48 and 72 h) and water temperature (25, 35 and 45 °C). The resulting extract was analyzed for its physico-chemical properties (pH, EC, TC, TN, TP, TK, Ca, Mg and Na) using standard procedures. The results showed that compost extract gave higher amount of nutrients when compared to particulate compost and was significantly (p < 0.05) affected by compost rate, steeping time and water temperature. In conclusion, suitable conditions for physico-chemical properties of the compost extract were obtained at 20 t/ha compost rate at 72 h steeping time and 25 °C water temperature.
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    Investigation into the suitability of well water near cassava processing areas for drinking and irrigation purposes
    (2021) Oyewusi TF; Osunbitan JA; Taiwo A
    Water used for domestic and irrigation purposes are sometime contaminated by organic and inorganic pollutants from cassava processing centres. Accordingly, groundwater from ten randomly wells were analyzed for pH, turbidity, total suspended solids (TSS), total dissolved solids (TDS), electrical conductivity (EC), sodium adsorption ratio (SAR), CN−, Na+, K+, Ca++, Mg++ and NO3− ion concentrations and the microbial content to determine the suitability of these waters for drinking and/or irrigation purposes. The qualitative analysis reveals that all the ten sites recorded permissible of limits for TDS (<500 mg/l for drinking purposes). Also, all the sites had permissible limits for EC values (<750 dSm−1 recommended for irrigation water) and thus can be used for irrigation with adequate attention on irrigation duration and frequency, drainage and crop species. However, none of the groundwater samples satisfy the World Health Organization (WHO) guidelines of 0.1 mg/l cyanide value and zero coliform bacterial count for drinking water quality and are therefore not recommended for drinking.