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Soil microplastics
Summary
Researchers dug up soil samples to measure tiny plastic coating fragments left behind after farmers use slow-release fertilizers, which are covered in a plastic shell that gradually breaks down and stays in the soil. This matters because these plastic bits can accumulate in farmland over time, potentially entering the food we grow and eat, though this study focused on measuring how much plastic is there rather than testing health effects directly.
This project investigated the abundance and areal density of polymer-coatings left after slow-release fertilizers were applied. Samples were collected by excavating a small monolith (625 cm2) from 0-5cm or 5-10cm deep. Soil plastics were separated out by mechanical sieving and tweezers' date - Date on which sample was collected flag_location - Unique location identifier elevation - Hillslope position of sample locations watershed - Which watershed does the sample belong to East or West (Adjacent watersheds) depth - Sampling depth mass - Mass of polymer coatings (g) collected (625 cm2) count - Number of polymer coating collected n_m2 - Number of polymer coatings per square meter mass_m2 - Mass (g) of polymer coatings per square meter mass_n - Average mass of an individual polymer coating