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Volume 58, Issue 320, August 2022

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Characterization of drought indices in two tropical climates located in the derived Savanna and southern Guinean Savannah region of Nigeria (Lokoja, Kogi State and Minna, Niger State) using Standardized Precipitation and Evapotranspiration Index (SPEI) for a period of 33 years, (1975- 2007), and the impact of drought on their agricultural activities was investigated. Climatic data such as temperature, rainfall, and potential evapotranspiration obtained from the Climatic Research Unit (CRU) were analyzed with Microsoft excel. The Standardized Potential Evapotranspiration Index (SPEI) was analyzed with R programming language. The non-parametric Mann-kendall test was used to observe the trends of the climatic variables on an annual scale using SPSS. The Mann-Kendall test revealed that the correlation of the trend parameter was not significant for Lokoja but significant for Minna. The SPEI showed that near-normal drought condition was ubiquitous in the study areas. This paper concluded that drought events have hazardous consequences on agricultural activities in Lokoja and Minna. (Ref: Adaji JO, Ogolo EO. Characterization of drought and its impact on agriculture in two tropical stations in Nigeria. Discovery, 2022, 58(320), 907-913).

Table of Contents

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ENGINEERING

Fault Tree Analysis for Mitigation of Equipment Failure during Covid-19 in Nigeria: A Case Study

IGBERE Ndukam Billy, Ukpaka CP, Nkoi B

Accidental events in manufacturing industries can be caused by several factors, including poor risk management that leads to damage to assets, high maintenance cost, environmental damage, reduced production output, facilities and injuries

Discovery, 2022, 58(320), 839-856

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Study of Design of a Cost Effective Three-Phase Horizontal Separator for Optimization of Crude Oil Separation

Ukeje AE, Ukpaka CP, Uku Eruni Philip

The design of a three-phase horizontal separator for the separation of crude oil mixed with water into oil, water and gas has been developed. Design is a novel method in engineering, especially in chemical engineering for the sizing of equipment and specification

Discovery, 2022, 58(320), 857-873

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Reliability of Valve Failures in Niger Delta Refinery Ltd Plant

Uku Eruni Philip, Ukpaka CP

Reliability on values were investigated with the effect of fluid flow on the rate of failures in Niger Delta Refinery plant. The obtained results demonstrates the ageing factors on constant failures of the values as well as the flow characteristics

Discovery, 2022, 58(320), 874-892

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SCIENCE

Floral biology and pollination of Jasminum angustifolium Willd. and J. cuspidatum Rottler (Oleaceae)

Suvarna Raju P, Solomon Raju AJ

J. angustifolium is a herbaceous vine while J. cuspidatum is a woody vine. The flowers of both species are hermaphroditic, dimorphic, distylous, fragrant and nectariferous

Discovery, 2022, 58(320), 893-897

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Haematological and serum biochemical indices of broiler starter chicks fed diets containing different levels of aqueous Citrus aurantium stem bark extract

Alagbe JO, Jubril EA, Ramalan FL, Tanimomo MN, Azzezah Abdulrrauf-Babalola, Shittu MD

The aim of this experiment was to evaluate some haematological and serum biochemical indices of broiler starter fed diets having different levels of aqueous Citrus aurantium stem bark (CASR).

Discovery, 2022, 58(320), 898-906

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Characterization of drought and its impact on agriculture in two tropical stations in Nigeria

Adaji JO, Ogolo EO

Characterization of drought indices in two tropical climates located in the derived Savanna and southern Guinean Savannah region of Nigeria (Lokoja, Kogi State and Minna, Niger State) using Standardized Precipitation and Evapotranspiration Index (SPEI)

Discovery, 2022, 58(320), 907-913

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Proximate, phytochemical and heavy metal levels of selected ripened fruits sold in market outlets within Enugu metropolis, Enugu State, Nigeria

Okeke O, Aniobi CC, Akagha IC, Okoro MU, Nwosu D

Studies were carried out to evaluate the proximate, phytochemical and heavy metal levels of selected ripened fruits (paw-paw, banana and plantain) sold in market outlets within Enugu metropolis, using standard analytical procedures and instrumentation.

Discovery, 2022, 58(320), 914-920

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Ecological aspects of sexual reproduction in Stinking Passion Flower, Passiflora foetida L. (Passifloraceae)

Suvarna Raju P, Solomon Raju AJ

Passiflora foetida is an annual or perennial herbaceous climber. The flowers are large, hermaphroditic, nectariferous and fragrance with specialized bracts that protect the buds and flowers from florivores

Discovery, 2022, 58(320), 921-925

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SOCIAL SCIENCE

The long-run and short-run effects of price fluctuation on production of selected food grains in Nigeria (1981 – 2020)

La’ah D, Adaji DU, Ochoche CO

The study examined the long-run and short-run effects of price fluctuation on production of selected food grains in Nigeria (1981 – 2020). The data for this study were collected from secondary sources

Discovery, 2022, 58(320), 926-934

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Whistle Blowing Policy in Nigeria: Concerns for Organization Ethical Values

Abdulhafeez Salauddin, Adeboye Titus Ayinde

The high-profile media attention which whistle blowing has attracted in Nigeria in recent time underscores its relevance in organizations

Discovery, 2022, 58(320), 935-940

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