Combined ANOVA was performed across two and seven sites for
data obtained in Exp 1 and 2, respectively. In Exp. 1, site, N
fertilizer, CA amount and cultivar were considered fixed effects in
the statistical analysis of grain yield, leaf SPAD and XSF. Site and CA
amount were fixed effects in the analysis of SHC. Similarly, the
effects of site and CA amount were considered to be fixed in Exp 2.