The Effect of Engine Oil Petrol and Diesel on the Germination and Growth of Maize.

Student: Abba Thlama (Project, 2025)
Department of Biology
University of Maiduguri, Borno State

Abstract

ABSTRACT This study investigates the impact of used engine oil, petrol gas, and diesel contamination on the growth and germination of maize (Zea mays), a critical global staple crop. Soil contamination by these substances disrupts soil fertility and microbial activity, posing severe challenges to agricultural productivity and food security. Controlled experiments were conducted to evaluate the effects of varying concentrations of these contaminants on maize growth, soil pH, and microbial balance. Results showed that diesel exhibited the highest toxicity, followed by engine oil and petrol. High contaminant concentrations significantly reduced germination rates, plant height, and leaf area, with visible physiological changes such as yellowing leaves and stunted growth. This study highlights the urgent need for proper disposal methods and environmental legislation to mitigate the adverse impacts of these pollutants on agriculture and ecosystem health.

Keywords
effect engine petrol diesel germination growth maize
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