Fig. 3
Effects of water contents on ammonia gas emission from soil [a NH3 emission, b accumulated NH3-N, 1 N + 2.7 W (1 g urea + 2.7% Soil Water Content (SWC)), 1 N + 4.3 W (1 g urea + 4.3% SWC), 1 N + 5.5 W (1 g urea + 5.5% SWC), 1 N + 8.0 W (1 g urea + 8.0% SWC), 1 N + 15.1 W (1 g urea + 15.1% SWC), 1 N + 18.6 W (1 g urea + 18.6% SWC), 1 N + 25.0 W (1 g urea + 25.0% SWC)]. Error bar indicates standard deviation (n = 3; mean ± SD). Different letters indicate significant difference according to Duncan’s multiple range test (DMRT) (p < 0.05)