Tested were two
application levels of biochar [(1) control (none) and (2) 8 t ha1],
and four fertilizer treatments,
[(1) control (none), (2) N fertilizer
(50 kg N ha1; urea), (3) P fertilizer (50 kg P ha1; triple superphosphate)
and (4) 50 kg N and P ha1],
in a split plot design with
three replications (plot size of 3 m 3 m). Only Apo was grown in
this experiment.