FIG. 6 SECONDARY AND BACKSCATTERED ELECTRON SCANNING MICROGRAPHS AND ELEMENT MAPS FOR RICE HUSK BIOCHAR FROM LAND DEVELOPMENT DEPARTMENT EQUIPMENT (LDD) SHOWING A LAYER OF SILICA AND GRAINS OF CALCITE, ARCHERITE AND CHLOROCALCITE IN THIS SAMPLE.
FIG. 7 SCONDARY AND BACKSCATTERED SCANNING ELECTRON MICROGRAPHS AND ELEMENT MAPS FOR
TRADITIONAL RICE HUSK BIOCHAR (T) CONTAINING CALCITE AND ARCHERITE.