The main effect of CA and the interaction effects of S CA
and S CA N were significant in Exp 1, while only the effect of
S CA was significant in Exp. 2 (data not shown).
In contrast to the positive effect on SHX and XSF, CA resulted in decreased leaf SPAD values.
The decrease was most prominent at HK1, where leaf SPAD
values for treatments without N fertilizer application were lowest
at the 16 t ha1 CA-level for Apo and at the 8 t ha1 CA-level for Vieng.
Similar trends in leaf SPAD values were observed at LO1, but
the differences were not statistically significant