Funmilola Felicia Oyebanji This email address is being protected from spambots. You need JavaScript enabled to view it.1, Godson Rowland E.E. Ana2, Yahaya Mijinyawa3, Olusola Olabisi Ogunseye2

1 Environmental Management and Toxicology, Federal University of Agriculture, Abeokuta, Nigeria
2 Environmental Health Sciences, University of Ibadan, Ibadan, Nigeria
3 Agricultural and Environmental Engineering, University of Ibadan, Ibadan, Nigeria

Received: August 7, 2020
Revised: January 15, 2021
Accepted: February 18, 2021

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Oyebanji, F.F., Ana, G.R.E.E., Mijinyawa, Y., Ogunseye, O.O. (2021). Predicting Exposure to Dust Particles Using Spirometric Index and Perception Studies among Farmers in Selected Farm Settlements in Ogun State, Nigeria. Aerosol Air Qual. Res. 21, 200509.


  • Agricultural activities pose negative impacts on air quality and health.
  • Crop production increases the risk of lung dysfunction in farmers.
  • FEV1 depends on occupational exposures and indoor residential features.
  • The perceived exposure impact is at variance from the real-time impact measurement.


The link between agricultural activities and respiratory disease puts farmers at risk of exposure to particulate matter, potentially reducing lung function. Thus, this comparative cross-sectional work employed a spirometric index and perception studies by conducting interviews and on-the-spot lung function tests on 195 farmers living in seven farm settlements of Ogun State and 195 non-farmers living in other areas to assess the ambient levels of the suspended particulate matter and estimate the dust exposure among the first group. The collected data were evaluated through descriptive and inferential statistics and indicated that the majority of the farmers (51.8%) applied manure, fertilizer and chemical sprays without using personal protective equipment (PPE), although a large percentage of both the farmers (74.9%) and the non-farmers (82.1%) understood that poor air quality could cause respiratory disease. The highest concentrations of the total suspended particles (TSP; 29.89 ± 23.52 µg m–3) and PM10 (18.45 ± 16.97 µg m–3) were observed during the wet season, whereas that of the PM2.5 (18.45 ± 11.72 µg m–3) was observed during the dry season. Additionally, the mean concentrations of the PM10 and PM2.5 exhibited significant seasonal variation (p < 0.001). The forced expiratory volume in 1 second (FEV1) and peak expiratory flow rate (PEFR) also varied considerably between the farmers (1.16 ± 0.87 and 244.32 ± 117.96, respectively) and non-farmers (2.47 ± 0.87 and 271.29 ± 104.09, respectively). Our results showed that the farmers engaged in poor safety practices and possessed reduced lung function compared to non-farmers. Hence, we advise farmers to adopt the use of PPE and follow safety measures. Furthermore, routine assessment of particulate matter and lung function should be encouraged in farm settlements.

Keywords: Farming, Particulate matter, Lung function, Occupational health, Safety practices


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