Fig. 2From: Addition of earthworm castings reduces gas emissions and improves compost quality in kitchen waste compostingAmmonia emission rate (A), ammonium-nitrogen (B), nitrate-nitrogen (C) and ammonium:nitrate ratio (D) for different treatments during composting. 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