Crop Protection & Environmental Biology
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Item Growth and yield response of Moringa oleifera (Lam) to different rates, method and timing of compost application.(Faculty of Agriculture and Forestry, University of Ibadan, 2013) Adejumo, S. A.; Olaleye, O. O.Moringa oleifera (L) production is recently being advocated for its outstanding phytochemical components with high medicinal values. However, its production is being threatened with poor soil fertility most especially in urban areas. Field experiment was carried out to determine the effects of time, rate and method of compost application on the growth and yield of Moringa oleifera. Composts made from Mexican sunflower and poultry manure, applied at 2.5t/ha (CI) and 5.0t/ha (C2), with two methods of application (surface; MI and drilling: M2) and applied at different times of application (2 weeks before transplanting: T1 and 2 weeks after transplanting: T2) to give nine treatments (CIMITI, C2MITI, CIMITI, C2M2TI, CIMIT2, C2MIT2, CIM2T2, C2M2T2 and Control). The treatments were arranged using Randomized Complete Blocks Design (RCBD) and replicated three times. Data were collected on vegetative development such as number of leaves, number of branches, stem diameter and plant height formightly for 12 weeks beginning from four weeks after transplanting (4WAT). At 12 weeks, the plants were uprooted and separated into roots, stems and leaves for fresh and dry weights determination. The post-cropping soil analysis was also carried out following standard procedure. Results indicated that compost treatments significantly enhanced growth parameters (P ≤0.05). C2M2T2 was superior to other compost treatments. It gave the highest number of leaves, number of branches. stem diameter and plant height. Fresh weight and dry matter accumulation were also influenced by organic amendment compared to control, Soil analysis result showed that amendment with compost generally increased soil nitrogen, available phosphorus, and organic carbon content of the soil. It could be concluded that 5t/ha of compost, applied after transplanting using drilling method increased the cumulative yield of Moringa oleifera.Item Field assessment of progressive remediation of soil contaminated with lead-acid battery waste in response to compost application(Scientific Research Publishing, 2011) Adejumo, S. A.; Togun, A. O.; Adediran, J. A.; Ogundiran, M. B.Addition of compost to heavy metal-contaminated soil has been employed to remediate contamination. Such rectification, however, depends on the type of compost and the contaminant involved. The efficacy of Mexican sunflower (MSC) and Cassava peel (CPC) composts applied at 0, 20 and 40 t/ha as well as inorganic fertilizer (NPK, 20:10:10) (100 kg N/ha) on the remediation of a battery waste-contaminated site in Ibadan, Nigeria was assessed. No compost or NPK fertilizer served as the control. The experimental design was a randomized complete block with 4 replicates. Soil analysis before and at 1, 2, 3 and 12 months after compost application was carried out. Mean lead (Pb) concentration (134,000 mg/kg) was high at this site. Twelve months after treatment, MSC and CPC applied at 40 t/ha had reduced the plant available lead concentration in the soil by 69 and 49%, respectively, whereas 20 t/ha had reduced the concentration by 58 and 34%, respectively. The relationships between soil lead and organic matter content (r = -0.75), phosphorous (r = -0.59) and pH (r = -0.77) were negative. NPK fertilizer had a limited effect (7% reduction) on Pb. Application of MSC at 40 t/ha brought about a remarkable reduction in Pb concentration.