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In order to evaluate the effectiveness of the corrosion prevention practices applied to agricultural equipment manufactured and used in Nigeria, it is necessary to identify the various corrosion prevention methods and specify the contribution and the efficiency of each method to corrosion protection. This paper outlines the basic corrosion prevention methods used in practice and attempts to evaluate the effectiveness of their use in relation to agricultural service in Nigeria. The results of this study indicated the use of oils, fats, waxes and lubricants on metal parts, spraying with gasoline on corrosion‐sensitive parts constituted the majority of applied corrosion protection in industries where the equipment is manufactured and/or used. The study concluded by giving practical recommendations that are essential for improving corrosion prevention in the Nigerian agricultural industry.

Because of the peculiar nature of food and agro‐processing industries, the industries cannot tolerate corrosion deposits in their production lines. Hence, there is the need to account for corrosion control before and during the production operations. This is more so in Nigeria where there is little or no proper accountability of corrosion cost in all production system.

The industries investigated were grouped into: meat and meat product, dairy and milk, beverages and brewery, confectionery and agro‐processing centres. Questionnaires and interview pro forma were used to collect information from ten major factories/outlets in each category. The study involved the use of life cycle costing to assess corrosion management alternatives and to determine the annualized value of each option.

Among the corrosion prevention methods identified in the industries, greasing gave the least cost contribution (15.9 percent) to the total cost of corrosion prevention followed by painting (17.97 percent) and cleaning (66.14 percent) in that order, while the contribution of each corrosion maintenance method to the total cost of corrosion maintenance was, respectively, 13.08, 7.23, 20.73 and 58.96 percent for annual maintenance, repair, rehabilitation and wages of workers.

This study reveals some of the control measures commonly adopted for minimizing corrosion damage in some selected food and agro‐processing industries in Nigeria. It also investigated the cost implication of each measure and how it affects the present value of processing machineries in each industry. The results of the study have created a state of awareness of corrosion problems to stakeholders, which would encourage preventive actions.

The purpose of this paper is to investigate tractor maintenance practices and costs in Nigeria with a view to making replacement decisions and for overall farm budgeting.

The information was obtained via a structured questionnaire. Tractor owners were grouped into three categories: government agricultural settlements, established farms, and individual farms. Data used for analysis were collected from 60 farms located in major farming centers of the southwestern part of Nigeria. The report includes the formulation of repair equations, which relate tractor repair cost as a percentage of initial purchase prices to cumulative hours of use. Life cycle costs of three commonly‐used tractors were also estimated. The derived equations, which showed that the repair costs per hour increased with hours of use, were used to obtain the life cycle cost of each tractor model in different tractor owners' farms.

The proposed equation was found to be the best fit with coefficient of determination (R²) ranging from 0.992 to 0.996 for tractors in the three user categories. The trend observed in the life cycle costing of the three common tractors gave the general picture of when to replace each of the tractors based on the strategies being adopted by the tractor owners.

The results of this study would serve as baseline information to tractor owners regarding optimum use of tractors for minimizing repair and maintenance cost per hour and for making replacement policy. It would also be helpful to government and other agencies for future planning in the provision of tractor services to the farmers at relatively lower repair and maintenance cost.

Proves that a reduction in repair costs by careful operation and adequate maintenance could result in a significant reduction in tractor ownership costs.

Direct energy utilization in nine palm‐kernel oil (PKO) mills located in Southwestern Nigeria was analyzed. The mills were stratified into small, medium and large‐scale categories, based on their modes of operations and production capacities. Evaluation of energy usage was carried out in the seven readily defined unit operations namely: palm‐nut drying, palm‐nut cracking, palm‐kernel roasting, palm‐kernel crushing, PKO expression, PKO sifting and PKO bottling/pumping. PKO extraction rates in the three mill categories were evaluated. The average PKO extraction rate for small, medium and large mills were 48.45 percent, 42.68 percent and 36.24 percent, respectively. The total energy expenditure in small, medium and large‐scale PKO mills were 350.89MJ/tonne, 230.70MJ/tonne and 181.74MJ/tonne, respectively. This suggests that the unit energy requirement for PKO output decreases as mill capacity increases. The four most highly energy‐intensive operations identified were palm‐nut cracking, palm‐kernel roasting, palm‐kernel crushing and PKO expression, altogether accounting for 95.29, 92.14 and 93.65 percent of total energy used in small, medium and large‐scale mills, respectively.

The cheapest and most rapidly available metal for agro‐processing equipment fabrication in Nigeria is plain carbon steel. However, there are some aggressive ions present in raw agricultural and food products, which may attack the steel components of these processing machinery, resulting in their untimely failure in service. The present study investigates the effect of fluid squeezed from cassava tuber on the corrosion behaviour of mild steel.

The investigation involved periodic weight loss measurements of 0.8 per cent carbon and 0.36 per cent carbon steel rods as they were exposed to cassava fluid. The relationships between loss in weight of the exposed samples and exposure period were determined. Models were developed to relate corrosion rate in each environment with total surface area and exposure period.

The results show that 0.36 per cent carbon steel was less affected by corrosion than 0.18 per cent carbon steel, with corrosion intensity in both cases, increasing with duration of immersion. Generally, there was low level of corrosion resistance (high corrosion rate) by the two steel materials. The correlation coefficient between the experimental values of corrosion rates and predicted values (using the developed models) was high.

In food and agricultural industries, product quality, health and sanitation issues are the major concerns. The industries cannot tolerate corrosion deposits in the manufactured products. Hence, material selection for machinery fabrication is essential. In line with this, the results of this study indicate that mild steel materials are unsuitable for use in cassava processing without some forms of surface treatment.

In Nigeria, the mango fruits consumption rate is high during its peak period and this has always resulted in environmental sanitation problem because the mango seeds are thrown to the surroundings immediately the fruits are eaten. Finding more useful application of the kernel would be a way to reduce the environmental pollution. Mechanical decortication of the leathery mango stone remains the only viable option that can support any prospected commercial uses of the mango kernel.

The decorticator consists of a hopper, a decorticating chamber, spiked shaft, screen shaker and discharge spout. The machine performance was evaluated in terms of decorticating efficiency, mechanical damage and sieve loss.

Results of the evaluation show that the optimum performance of the decorticator was at a speed of 900rpm, feed rate of 250kg/h and power requirement of 2.50kW.

Mango stones are useful as substitute for maize in finishing broiler diets. The kernel is also used for medicinal purposes in moderation of anti‐bacterial and anti‐fungal activities. Therefore, the designed mango stone decorticator enhances the complete mechanization processes of mango products.

In Nigeria, local fabricators of agro‐processing equipment have designed and manufactured various improvised versions of imported bread‐baking machines without due ergonomic considerations. Also, most of the processes of bread baking in Nigeria largely involve manual materials handling, which continues to represent a major loss source in the work place. The manual operations besides being uncomfortable are characterized by low output and unhygienic products. A study was therefore conducted in three southwestern states of Nigeria with the purpose of evaluating the energy requirements and man‐machine relationships in bread‐baking operations.

The study, which lasted over one year, involved the use of three fuel sources namely, firewood, electricity and cooking gas during bread baking operations. Questionnaire and physical measurements were employed for data collection from 50 bakeries randomly selected within the study area. The data points include the environmental and body temperatures, anthropometrical data, bio data, injury data, metabolic and production measurements.

The results of the study revealed that bread‐baking with wood as energy source required the highest energy (6.15 kJ/min) compared with 3.37 kJ/min and 1.52 kJ/min obtained with gas and electricity as sources of energy, respectively. The cost of energy per kg of baked bread was 7.58 with cooking gas followed by 6.05 for electricity and 5.05 for wood in that order. The average baking rate (BR) using firewood, gas and electricity as energy sources were, respectively, 11.92, 17.97 and 20.58 kg/h. Analysis of metabolic data showed moderate (not to a lethal level) increase in the subjects' body temperatures, blood pressures and heart rates after bread‐baking operations.

The study suggests that bread‐baking operations could be categorized as a light grade work and that the use of electricity as energy source is the most appropriate in terms of bread‐BR and unit energy requirement.

Agriculture remains the largest sector of Nigerian economy, generating employment for about 70 per cent of the population. With the ever‐increasing market demand for agricultural products, mechanisation of most farm operations is gradually on the increase. This new development has brought about an increase in the cases of accidents through the use of farm tractors.

This study was carried out in the south‐western part of Nigeria to investigate the safety measurement, effectiveness, and its contributions to farm tractor usage in the State. The study identified various causes of farm tractor accidents, consequences and different classes of farm tractor‐related accidents. The effectiveness of each accident prevention method and frequency of use were investigated and put into consideration in the data analysis.

It was revealed through the analysis that the use of safety protective wear gave the highest contribution (24.05 per cent) to total accident prevention on farms while the use of orientation training and seminars gave the least contribution (8.30 per cent) with the lowest frequency of use than the other methods.

The results of this study serve as baseline information for tractor manufacturers regarding the inclusion of certain parts in new or proposed tractor designs with particular peculiarity to Nigerian farmers.

This paper gives an estimation of the magnitude of farm tractor accidents in relation to the Nigerian farming situation and proposes remedial actions.

This paper aims to investigate the safety practices in some selected agro‐allied industries in south‐western Nigeria with a view to analysing the degree of safety awareness; adequacy of safety equipment; extent of enforcing safety rules; effectiveness of safety‐related activities and economics of safety programme.

A case study method of investigation, field study guidelines and binary variable were used and information gathered from 36 industries was documented. The data collected were analysed using mean, percentage and standard mathematical models. The analyses carried out on the data gathered are presented on the following: occurrence of accidents, causes of accidents, damages resulting from accidents, accident prevention activities and economic implications.

Three classes of accidents are identified as fatal, serious, and minor. The results showed that minor accident has the highest frequency of occurrence of 304, while fatal accident has the least frequency of occurrence of 17. However, serious accident has the greatest economic implication, accounting for annual average loss of $4.97 millions. Also, nine causes of accidents are identified, out of which faulty equipment is common to all industries. And eight accident prevention activities are identified, amongst which standard operating procedure, good housekeeping and on‐the‐job training are commonly being practised, while provision of safety handbook and policy is least practised.

This paper has described the safety practices in 15 agro‐allied industries with an organised safety programme in South Western Nigeria. The study has investigated the extent of enforcement of safety rules; safety awareness; and economic implication of accidents from this sector for the national economy.

It is difficult to develop an overall picture of the practice of management accounting (MA) in farms and farm enterprises (FEs) because little research has been published on the topic, and these studies are mostly discrete and unconnected to the others. The purpose of this paper is to provide an overview of the available research, develop an explanatory framework for MA practices in farming entities and identify some major avenues for future research on the topic.

This paper uses systematic literature review methods. After an extensive database search and an examination of references/citations, 41 empirical journal articles published between 1964 and 2016 are identified, described and analyzed in this research paper.

The findings reveal that the practice of MA in farms is subject to information problems and that the empirical research on this topic largely lacks a theoretical explanation. Therefore, the explanatory framework of MA practices in farming entities reveals that these practices are subject to influencing factors such as familism, government farm policies, market competition, technological changes, the seasons and the weather/climate.

The overall limited findings on the practice of MA in FEs indicate that caution should be taken when generalizing the current knowledge on the use of MA practices in other organizational forms to farming entities. Moreover, future research should draw on explicit theories to explain empirical results.

This paper is the first comprehensive literature review of studies on MA practices in farms and FEs.