https://www.agronomy.org/news-media/...2010/0802/396/

"Initially, biochar application produced inconsistent effects. Several
early samples produced greater nitrous oxide emissions and nitrate
leaching than the control samples.
*
However, during the third wetting*drying cycle, four months after
biochar application, all biochars reduced nitrous oxide emissions by up
to 73%, and reduced ammonium leaching by up to 94%. The researchers
suggest that reductions in nitrous oxide emissions and nitrogen leaching
over time were due to ³ageing² of the biochars in soil."
*

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Bill S. Jersey USA zone 5 shade garden
What use one more wake up call?
globalvoicesonline.org
http://www.youtube.com/watch?v=zlfKdbWwruY