Fig. 1: Dataset overview and relations between soil pH and emission factors.
From: Enhanced nitrification in higher pH soils moderates ammonia emissions in global croplands
a Geographical distribution of the sample sites; boxplots of average emission factor (EF) (b) and soil pH (c) for paddy rice, wheat and maize in the dataset; The boxplots show the median (line inside the box), mean (cross in the box), 25th and 75th percentile (top and bottom edges of the box), and 5th and 95th percentile (whiskers) value. Linear regression between soil pH and EF for paddy rice (d), maize (e), and wheat (f). The dashed lines represent the 95% confidence intervals.
