As shown in Figure 10 and Table 6, the crop yields in the fields treated with biochar and
50% fertilizer are much higher than that of the field with 100% fertilizer application only.
It may be inferred that the use of biochar as a soil amendment may reduce fertilizer use
while at the same time maintaining high crop yield, even though an increase in crop yield
did not occur with increasing fertilizer application rates in the absence of biochar in this
study,