The study examines the accumulation of microplastics in agricultural soils over time, focusing on the impact of fertilizers. Microplastics, which are derived from both organic and inorganic fertilizers, have been shown to increase significantly in concentration in soils amended with these fertilizers between 1966 and 2022. The research used a historical time series from the Rothamsted Sample Archive to analyze soil samples collected at various time points. The results indicate that microplastic concentrations in soils treated with farmyard manure (FYM) and inorganic fertilizers (N3(P)KMg) were significantly higher than in soils without any amendments (Nil). The study highlights that agricultural fertilizers are a significant contributor to microplastic pollution in soils, posing a growing environmental and health concern. The findings suggest that agricultural soils are not only receptors but also reservoirs of microplastic pollution, with implications for agricultural productivity and food security.The study examines the accumulation of microplastics in agricultural soils over time, focusing on the impact of fertilizers. Microplastics, which are derived from both organic and inorganic fertilizers, have been shown to increase significantly in concentration in soils amended with these fertilizers between 1966 and 2022. The research used a historical time series from the Rothamsted Sample Archive to analyze soil samples collected at various time points. The results indicate that microplastic concentrations in soils treated with farmyard manure (FYM) and inorganic fertilizers (N3(P)KMg) were significantly higher than in soils without any amendments (Nil). The study highlights that agricultural fertilizers are a significant contributor to microplastic pollution in soils, posing a growing environmental and health concern. The findings suggest that agricultural soils are not only receptors but also reservoirs of microplastic pollution, with implications for agricultural productivity and food security.