The challenge is how can i use the biochar without washing out the inherent phosphorous and have it not leach out phosphorous during absorption experiment?
My opinion is that you would be strategically better to run an experiment with the biochar alone and measure the ourcome. That may or may not enable you to design an experiment where the biochar is mixed with soil.
Please can you explain further because I did experiment with it and it is leaching out phosphorus. Apparently, I have to try same biomass modified before pyrolysis with Calcium and iron based activating agent 10% dosage yet leaching occurs
During absorption experiments, the sorption or leaching will depend on the concentration of the phosphate solution. Previous research work has revealed an increase in the concentration of phosphorus at equilibrium time after sorption experiments at lower phosphate solution concentrations, while at higher concentrations of phosphate solution, sorption was observed.