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Influence of mulch and poultry manure application on soil temperature,evapotranspiration and water use efficiency of dry season cultivated okra

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International Soil and Water Conservation Research 2023年第2期11卷 382-392页

作者： Mutiu Abolanle Busarit ganiyu olawale bankole Idris Adebanjo Adiamo Rasaq Olayiwola Abiodun Olanrewaju Hammed Ologunde Department of Soil Science and Land Management Federal University of AgricultureAbeokutaPM.B2240AbeokutaNigeria

Sustainable vegetable production especially during the dry season requires adequate conservation of soil *** study was conducted to evaluate the sole and interactive effects of mulching(M)and poultry manure(PM)application on soil temperature(ST),crop evapotranspiration(ETc)and water use efficiency(WUE)of *** experiment was a Randomized Complete Block Design(RCBD)with three *** treatments were M at 0 and 6t ha^(-1)and PM at 0,10 and 20t ha^(-1).Soil temperature was measured using digital thermometer while ETc was determined by water depletion method using a Time Domain *** at field capacity was applied manually at 2-day *** appli-cation of mulch significantly lowered ST while joint application of 20t ha^(-1)PM(PM20)and M signifi-cantly(p≤0.05)reduced ST at 5 cm and 10 cm soil depth compared with the unmulched plots in both *** of 10t ha^(-1)PM(PM10)without M recorded the highest ETc(43.7 mm),while joint application of PM20 and M reduced ETc by about 93%compared with PM10 *** used water most efficiently when PM20 was applied under mulched *** was 62.2%increase in WUE under mulched plots compared with the control while the residual effect of PM10 and M significantly increased WUE by 65.5%.It was evident that M alongside application of PM is a good strategy for regulating ST,moderating ETc and increasing okra WUE,especially during dry season farming.

关键词： Evapotranspiration Soil temperature Volumetric water content Water depletion method Water use efficiency

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The Nexus between Nigerian Government Spending and Domestic Output in the Presence of Long-Term Crude Oil Price Shock: A Conditional Unrestricted Equilibrium Correction Model Approach

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Open Journal of Statistics 2016年第3期6卷 412-425页

作者： Lawal Omoniyi ganiyu Alabi Nurudeen olawale Ige Sikiru Ajibade Ibraheem Rahmat Abisola Department of Statistics Yaba College of Technology Lagos Nigeria Department of Mathematics Yaba College of Technology Lagos Nigeria

This paper is an empirical analysis of provisional unrestricted level relationship between Nigerian domestic output measured by Gross Domestic Product (GDP) and government spending proxied by capital and recurrent expenditures in the presence of static regressors such as crude oil prices and federal government retained revenues. We estimate an ARDL (1,0,1) using a single-equation approach. Results show that government expenditures have negative but statistically insignificant effects on domestic output in the long-run. Similarly, negative short run effects are established amongst the variables. However, recurrent expenditure is statistically significant in the short-run. Whilst federal government retained revenue has a positive and significant effect, crude oil price exhibited negative relationships with domestic output both at level and in the short-run dynamics. Also a high speed of adjustment implies that Nigerian Gross Domestic Product is extremely sensitive to shocks on the government spending in the long-run. An upward trend forecast between 2014 and 2020 is an indication of the continued positive impact and the government retained revenue will exert on the domestic output in the long-run.

关键词： Level Relationship Domestic Output Government Spending Single-Equation Approach

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Tensile Properties and Fractographic Analysis of Low Density Polyethylene Composites Reinforced with Chemically Modified Keratin-Based Biofibres

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Journal of Minerals and Materials Characterization and Engineering 2015年第4期3卷 344-352页

作者： Isiaka Oluwole Oladele Jimmy Lolu Olajide Okikiola ganiyu Agbabiaka olawale Opeyemi Akinwumi Department of Metallurgical and Materials Engineering Federal University of Technology Akure Nigeria African Materials Science and Engineering Network (AMSEN) A Carnegie-IAS (RISE) Network (FUTA Node) Akure Nigeria Department of Mechanical Engineering Elizade University Ilara-Mokin Nigeria

This research has investigated the tensile properties and fractography of animal fibre-reinforced low density polyethylene composites. The composites were synthesized by hot compression moulding using chemically modified white and black cow hair biofibres as the reinforcing phase of composites. Alkaline solutions of varying molarities were used to prepare the chemical treatments in this present study. Tensile properties of the developed composites were evaluated based on molarities of chemical treatment and % fibre loading. Scanning electron microscopy was used to characterize the morphologies of the fractured surfaces of composites. Obtained tensile test results revealed significant enhancement in the tensile properties of composites, with the optimum combination of tensile properties presented by 2 wt% white cow hair biofibre reinforcement treated with 0.15 M sodium hydroxide. Observations from the fractographic analysis of the developed composites revealed shearing of the polymer matrix at the fibre-matrix interface and no fibre pullout behaviour.

关键词： Animal Fibre Alkaline Treatment Fibre-Matrix Interface Mechanical Behaviour Polymer Matrix Composites

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