The increasing demand for the “Miracle Tree”, Annona muricata, also known as Sour sop has led to the need for increased production. However, the importance of appropriate growing media for the propagation of this seedling cannot be over emphasized. This experiment was conducted in 2019 at the screen house of the Soil and Tree Department of Forestry Research Institute of Nigeria, Ibadan, Oyo State to evaluate the effect of different composted media on the growth Annona muricata L (Sour sop). The experiment was laid out in Complete Randomized Design with sixteen (16) treatments and three replicates. Data on growth parameters were collected and analyzed using Analysis of Variance (ANOVA). Means were separated using Duncan’s Multiple Range Test at 5% probability level. It was observed that treatment A2 (80: 20; soil: OF; v/v) performed significantly higher in, number of leaves, plant height and stem girth followed by treatment A3 (60:40; soil: OF; v/v). This study concluded that the growing media or treatment A2 (80: 20; soil: OF; v/v) was optimum for the growth of Annona muricata.

Pollution from Spent Lubricating Oil (SLO) is one of the major problems farmers encounter in Nigeria. The study is a completely randomized design with Ibadan Local tomato seedlings grown on the following treatments: 0 ml SLO (control), 75ml SLO, 35g of poultry-manure + 75ml SLO, 35g of cow-dung + 75ml SLO, and 4g of NPK + 75ml SLO replicated four times. Physico-chemical parameters of the soil, poultry manure (PM) and cow-dung (CD), heavy metals, and Total-Petroleum-Hydrocarbon (TPH) were determined before and after pollution using standard procedures. Tomato seedlings were transplanted into pots of amended soil with SLO (5 kg/2 plants) and monitored till maturity. Data were taken on growth, yield parameters and analyzed using ANOVA (p<0.05). Results showed significant differences among the treatments. The soil textural class was sandy-loamy with pH (7.2). Tomato in control plots had the highest values 48.30cm plant-height (PH), number-of-leaves (82.63) (NOL), number-of-fruits (0.98) (NOFR) and fresh-weight (0.55g) (FW). Tomato plants grown on CD amended had the lowest 14.40 cm PH, SLO at 75 ml had 6.00 and 1.71cm for NOL and SD, respectively. The NOFR 0.70 value was from PM amended, FW 0.10g was from SLO at 75ml. Heavy-metals bioaccumulation ranges were: Cu 3.00-36.61mg/kg and Zn 15.00-303.79mg/kg. The final TPHs ranged from 181.66 -1350.00mg/kg, while % TPH removal ranged from 4.69- 53.18%. Cow-dung treated soil reduced the amount of copper and zinc present compared with spent oil soil. The growth performance of tomatoes in this study suggests that soil amendment should be encouraged.

Aim: To investigate the early growth response of Morinda citrifolia to varying levels of Aleshinloye compost and N:P:K 15:15:15 in a degraded Alfisol in a tropical Nigerian environmental condition. Study Design: The study was laid out in a completely randomized design (CRD) with twelve (12) treatments replicated six (6) times with a total of seventy two (72) experimental units. Place and Duration of Study: The study was carried out in the greenhouse of Soil and tree Nutrition department of the Forestry Research Institute of Nigeria Ibadan (FRIN) and it lasted for a period of 6 month. Methodology: Degraded top soil used for the experiment was collected within FRIN arboretum. The soil was air dried and passed through a 2 mm diameter sieve before being filled into polythene pots of 15 cm x 20 cm dimension having a 3 kg soil capacity. The organic fertilizer was applied at 4 weeks before transplanting while the inorganic fertilizer was applied at 2 weeks after transplanting and pre-germinated seedlings of Noni were transplanted at four leaves stage. The data collected include Stem Girth (mm), plant height (cm) and Number of leaves starting from 30 Days After Transplanting (DAT). Results: The result revealed that the soil sample used for this study had pH value of 6.06 and the total N value of 0.11%. Noni plant with treatment T11 (N:P:K 15:15:15 at 80 Kg Nha-1 + Aleshiloye compost (AC) at 80 Kg Nha-1) had the highest plant height  values of 48.17, 65.67 and 77.87 cm respectively which are significantly higher (P = .05) than  T1 (control) with 37.17, 47.50 and 55.33 cm respectively that are the least values observed from 120 DAT to 180 DAT. The Plant Dry Matter (PDM) for leaves, stem and root (3.593, 2.720 and 4.220 g/plant) respectively from the control (T1) plant was the least when compared to every other treatment in the study. Conclusion: The use of composted manure in combination with N:P:K 15:15:15 ensured early and continuous supply of nutrient with resultant higher growth performance of Noni over a period of six months as shown in the study.

The functions and benefits of forest canopy cannot be over-emphasized. Hence, there is need for the assessment of forest canopy cover and tree benefits in Okomu National Park, Nigeria. Assessment of different land cover types, quantification of forest trees and the environmental services they provided and lastly, the monetary value of environmental services provided by the forest was estimated. The Okomu National Park shapefile was used to determine the ‘Define Project Area’ tool and Google Mapmaker to determine and cross reference boundary. An i-Tree Canopy software was used to analysis tree canopy coverage throughout Okomu National Park, Nigeria. This study derived eight (8) specific categories of tree canopy data which includes annual benefits based on canopy cover percentages. The categories include: carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3), particulate matter less than 2.5 microns (PM2.5), sulfur dioxide (SO2), particulate matter greater than 2.5 microns and less than 10 microns (PM10*), carbon dioxide sequestered annually in trees (CO2seq) was 369,974.94T, while carbon dioxide stored in trees) CO2stor) (not an annual rate) was 9,291,459.06T. Carbon monoxide (CO) has the least amount in tonnes with 33.33T. The particulate matter category less than 2.5 microns (PM2.5) which has less quantity had more monetary value (USD523,66835) than particulate matter greater than 2.5 microns and less than 10 microns (PM10*) with monetary value of USD183,90714.

Aims: To evaluate the effects of different concentrations of the plant extracts of Eucalyptus camaldulensis (EU), Eucalyptus torreliana (ET) and Leucaena leucocephala (LL) on seed-germination, seedling-growth, weed flora and yield performance of cowpea. Study Design: The study was laid out in a completely randomized design (CRD) with eighteen ttreatments replicated three (3) times, totaling fifty-four (54) experimental samples. The whole experiments were repeated in two trials. Place and Duration of the Study: This study was carried out on the roof top garden of department of Crop Protection and Environmental Biology, University of Ibadan, Nigeria from 2015 to 2017. Methodology: Leaves of EU, ET and LL were harvested, air-dried, milled and assayed for phytochemicals (mg/g) following standard-procedures. Milled samples (144, 108, 72, 36 and 0 g) of each botanical were dissolved in 1 L distilled-water to obtain Aqueous-Leaf-Extracts (ALE) of 100, 75, 50, 25 and 0% (control) concentrations. Ten seeds of cowpea-Ife brown in petri dishes were treated with the different concentrations. Data were collected on Seed Germination-SG (%). In pots containing 10 kg soil, cowpea-seeds (2 plants/pot) were sown. Each botanical-extract at different concentrations and paraquat (5 mL/L/ha) were applied, before and five Weeks-After-Sowing (WAS). Data were collected on Plant height-PH (cm) at 3,5,7,9 and 11 WAS, while Grain Yield-GY (g/pot) was determined at maturity. Relative Importance Values (RIVs) were determined following standard-procedures. Data were analysed with descriptive-statistics and ANOVA at α0.05. Results: Total phenols (32.04±0.10), tannins (27.40±0.04) and saponins (20.15±0.03) were significantly higher in EU than in ET and LL. Cowpea SG ranged from 80.0±0.5 (50% LL) to 100.0±1.2 (100% LL). Cowpea PH ranged from 18.2±2.0 (100% ET) to 48.5±3.2 (100% EU) both at 9-WAS. Cowpea GY ranged from 0.1±0.1 (25% LL) to 4.2±0.5 (50% LL). Mitracarpus villosus had highest RIV of 52.3 (100% EU at 3-WAS) but reduced to 28.5 (100% EU at 9-WAS). Aqueous-leaf-extract of Eucalyptus camaldulensis at 100% reduced Mitracarpus villosus populations, while Leucaena leucocephala at 50% improved grain yields.