1 23 Biology and Fertility of Soils Cooperating Journal of International Society of Soil Science ISSN 0178-2762 Volume 50 Number 8 Biol Fertil Soils (2014) 50:1201-1209 DOI 10.1007/s00374-014-0950-7 Effect of biogas digested slurry based- biochar and digested liquid on N 2 O, CO 2 flux and crop yield for three continuous cropping cycles of komatsuna (Brassica rapa var. perviridis) Ankit Singla, Hirokuni Iwasa & Kazuyuki Inubushi