ABSTRACT
Biochar and rock dusts such as basalt are widely regarded as excellent slow-release, long-lasting, natural fertilizers by themselves, which should work even better in combination. Many field studies showing dramatic increases in productivity with rock powders or with biochar alone are shown in this book. But there are many reasons to believe that combining the two methods would synergistically increase both the magnitude and duration of biological responses to both of these natural plant growth enhancers.
