Fig. 6From: Addition of earthworm castings reduces gas emissions and improves compost quality in kitchen waste compostingCorrelation analysis based on heat map of physiochemical properties and gas emissions of compost piles. P values of 0.05, 0.01, and 0.001 denote significance at the 5, 1, and 0.1% levels, respectively. EC 0%: kitchen waste only; EC 2.5%: kitchen waste + earthworm castings 2.5%; EC 5.0%: kitchen waste + earthworm castings 5%; EC 7.5%: kitchen waste + earthworm castings 7.5%Back to article page