Biochar at high temperature generation in particular can be very alkaline. The inclusion of sufficient quantities could in some cases lead to an overly alkaline soil reaction which results in micronutrient deficiency potentialy. You may want to take reading on the alkalinity of biochar and analyze the nutrients in cultivated plants to confirm the suspected issue.
Dear Oladele,
In what dose/level of Nitrogen these results are obtained?
Thanks for the response. @ Dr. hepperly and Dr. Rao, I am presently conducting a test on collected soil samples and plan tissues, as soon as the results are out i ll keep you informed
I think , it should help in raising the crop response through betterment of soil fertility , if it is acidic Alfisol. But , the does seems to be on the higher ?. How do you arrive at optimum doses of biochar while using biochar as a soil amendment , regardless of feedstock composition ?
Very good!
Then your biochar is working. Basically, an ideal biochar should reduce nitrogen transformation and resultant N availability to the crops. In low N levels plant growth should be seriously affected as occurred in your experiment.
Try biochar in higher N environment s and observe change in N availability in soil.
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