Traditionally, biochar has been used at rates of 1 – 2 (or more) tonnes/Ha.
This type of application can be done with any type of biochar and is similar to applications of lime. In fact, it may be advantageous to incorporate biochar with your lime applications as biochar does have a small liming affect.
While these types of applications have proved beneficial, the economics are a constraint. There is a more strategic approach to applying biochar in soils and while the practice is not proven across a range of soil types and different locations, it does show promise.
Our own research is consistent with research carried out by the South Australian No Till Farmers Association (SANTFA). Smaller applications of biochar (30-100kg/ha), blended with traditional fertilisers and placed under the seed is maintaining or even improving yields, reducing the rate of fertiliser use and improving gross margins.
See more information please see SANTFA, Mingenew Irwin Group and our own trial information below.