JOURNAL OF DEGRADED AND MINING LANDS MANAGEMENT ISSN: 2339-076X (p); 2502-2458 (e), Volume 7, Number 4 (July 2020): 2319-2326 DOI:10.15243/jdmlm.2020.074.2319 www.jdmlm.ub.ac.id 2319 Research Article The impact of cassava wastewater from wet fufu paste processors on surrounding soils: a case study of Ayetoro, Ogun State, Nigeria Adedotun Temitope Adegoke 1* , Babajide Emmanuel Olowu 2 , Nurudeen Samuel Lawal 1 , Olubunmi Abosede Odusanya 2 , Oluseun Bamidele Banjo 3 , Oluwafemi Babatunde Oduntan 4 , Babasola Dapo Odugbose 1 1 Department of Agricultural Engineering, College of Engineering and Environmental studies / Olabisi Onabanjo University, Ogun State, Nigeria 2 Department of Crop Production, College of Agricultural Sciences/ Olabisi Onabanjo University, Ogun State. Nigeria 3 Department of Forestry, Wildlife, and Fisheries, College of Agricultural Sciences/ Olabisi Onabanjo University, Ogun State. Nigeria 4 Department of Aquaculture and Fisheries Management, Faculty of Renewable Natural Resources/ University of Ibadan, Oyo State, Nigeria * corresponding author: adedotun.adegoke@oouagoiwoye.edu.ng Received 20 April 2020, Accepted 6 June 2020 Abstract: Cassava effluent has become a subject of growing environmental concern in developing countries largely due to ineffective disposal methods. In this study, the impact of land disposal technique by processors in Ayetoro, Ogun State Nigeria was investigated. Soil samples were collected from three disposal sites scattered across the study area at depths of 0 cm, 15 cm, 30 cm and 45 cm. Results were compared with samples obtained from control sites at a distance of 5 m from the disposal sites. The physicochemical parameters determined include soil pH, silt, sand, clay, organic carbon, exchangeable acid, total nitrogen, available phosphorous, zinc, lead, iron, sodium, copper, calcium, potassium, magnesium and manganese. The result shows that the pH varies significantly across the sites. The highest concentration was recorded for phosphorous while the lowest concentration was obtained for total nitrogen. The highest concentrations were recorded at the soil surface while the lowest were recorded at 45 cm depth. Idagba recorded the highest pollutant concentration and while the lowest were obtained at kano street. The activities and discharge techniques of processors had negatively impacted the soil quality which may also affect the ground water quality. There is a need to take proactive measures to protect the environment through adequate sensitization and enforcement of environmental laws. Keywords: disposal, effluents, method, milling, soil To cite this article: Adegoke, A.T., Olowu, B.E., Lawal, N.S., Odusanya, O.A., Banjo, O.B., Oduntan, O.B. and Odugbose, B.D. 2020. The impact of cassava wastewater from wet fufu paste processing industry on surrounding soil: a case study of Ayetoro community, Ogun State, Nigeria. J. Degrade. Min. Land Manage. 7(7): 2319-2326, DOI: 10.15243/jdmlm. 2020.074.2319. Introduction Cassava is an agricultural product which is very essential in society and its importance for human and animal consumption cannot be overemphasized. The importance of cassava to the society is numerous which recommends the agricultural produce and its products to be useful for man. Cassava is a drought-tolerant crop which can be cultivated in soil with minimal soil nutrients. In recent time, cassava has been observed to be planted commercially when compared to the earlier days when it is majorly planted as a subsistence crop, this has improved the economic value of the crop. As a result of this, different research work is being conducted to improve