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Table 1 Reported concentrations of MP in soils by source

From: Review of microplastic sources, transport pathways and correlations with other soil stressors: a journey from agricultural sites into the environment

Class Author Quantity* Size range of analysed particles
Baseline assessment Choi et al. [26] 664  
Baseline assessment Corradini et al. [28] 0–306  
Baseline assessment Ding et al. [33] 143–3410  
Baseline assessment Feng et al. [41] 43–2  
Baseline assessment Harms et al. [56] 0–218  
Baseline assessment Huang et al. [64] 0.1–324  
Baseline assessment Lv et al. [99] 10  
Baseline assessment Piehl et al. [117] 0.34  
Compost van Schothorst [141] 888 ± 500 30 µm—2 mm
Compost Gui et al. [52] 2400 ± 358 50 µm—5 mm
Compost Braun et al. [21] 7 ± 3 ? –5 mm
Compost Weithmann et al. [169] 96 1–5 mm
Fertilizers Katsumi et al. [76] 6–369**  
Greenhouse Li et al. [93] 1000–3786  
Pig Manure Yang et al. [176] 43.8 ± 16.2  
Sheep faeces Beriot et al. [14] 997 ± 971 30 µm—2 mm
Plastic mulching van Schothorst [141] 2242 ± 984 30 µm—2 mm
Plastic mulching Beriot et al. [14] 2116 ± 1024 30 µm—2 mm
Plastic mulching Huang et al. [65] 80–308  
Plastic mulching Kim et al. [81] 215–3315  
Plastic mulching Li et al. [92] 420–1290  
Plastic mulching Meng et al. [104] 900–2200  
Plastic mulching Yu et al. [180] 310–5698  
Plastic mulching Zhou et al. [185] 263–571  
Sludge Corradini et al. [29] 1100–3500  
Sludge Crossman et al. [31] 541  
Sludge van den Berg et al. [12] 5190 ± 2630  
Sludge Zhang et al. [181, 183] 87.6–545.9  
Sludge Mahon et al. [101] 4200 – 15,000 250–5000 μm
Sludge Carr et al. [25] 5000 ? –5 mm
  1. The table considers research articles found in Scopus database that match “MP AND soils AND agriculture” and deal with microplastic pollution of arable lands. We removed reviews, letters, conferences, and articles related to modelling and toxicology from the final list
  2. *Quantities are expressed in MP particles per kg of dry soil. Ranges show the min and max values reported in the studies. When ranges were not reported, we took the mean value and its standard deviation. Single values without standard deviation (plus/minus sign) show that those studies only reported a single value for a treatment
  3. **Katsumi et al. [76] reported microplastics abundance in mg kg−1