A pooled sample of sun-dried Oedogoniumwas made from equal
parts biomass from four successive harvests in June 2013. The
biomass was converted to biochar through slow pyrolysis at five
different highest heating temperatures (HHT; 300, 450, 600, 750
and 900 C). Each of the biochar samples were produced by
weighing 150 g of Oedogonium into a ceramic bag which was put
into a muffle furnace purged with N2 gas (4 L min1). The biomass
was left at the HHT for 60 min, then removed and cooled to room
temperature under continued N2 flow and re-weighed to calculate
yield