Iowa State University (Archontoulis et al. 2016) have developed a biochar model for APSIM that integrates biochar knowledge and enables simulation of biochar effects within cropping systems.
This model has been released in APSIM 7.9 as an ‘example’. It can be accessed by clicking ‘New’ from within the user interface and selecting the biochar folder. For more details see http://onlinelibrary.wiley.com/doi/10.1111/gcbb.12314/full