Fig. 1: Study area and soil properties across three geomorphological units.
From: Unstable geogenic arsenic in reclaimed coastal soils poses environmental risks
a Distribution of reclaimed land, hilly and cultivated land in the study area. b pH. c Arsenic. d Organic matter. e Relationship between As and Fe contents in 29 reclaimed and hilly soils. Data from 1029 soil samples from reclaimed lands (n = 775), hilly slopes (n = 81) and alluvial plain (n = 173). Scatter plots show individual samples (red circles represent reclaimed soil, blue circles represent hill soil, purple circles represent alluvial soil); box plots display five-number summary statistics (maximum, minimum, 25th and 75th percentiles and mean values).
