In line with the first year (2015) results, there was no significant difference between any of the treatments. Again, there were enough nutrients in the soil to maintain a crop of this level.
A major outcome of this trial was that using biochar at low rates may not improve crop productivity in the shorter term. It may take 3 or 4 years to see the benefits and we need to take a longer term approach when trialing biochar.
As SANTFA showed, there are financial benefits for using low rates of biochar with fertiliser in a cropping scenario. There are also carbon farming opportunities using biochar based fertilisers.
Unfortunately, we were unable to secure funding to continue these trials but we are still very keen to be involved in any biochar based research. Please contact us if you have an idea or want to talk about biochar based fertilisers.