Results of fixed factor four-way analyses of variance (ANOVA) on plant and soil parameters.

DTPA: diethylene triamine-penta-acetic acid. na: not applied, r: removed from the statistical model, ns: not significant, *, p<0.05; **, p<0.01; ***, p<0.001. The measurements of the plant parameters {grain biomass, total above ground biomass, grain N concentration, grain Zn concentration, aboveground Zn concentration, Zn uptake to grains, Zn uptake to the aboveground biomass, Zn derived from green manure in the aboveground biomass [Zndgm], proportion of the Zn recovered in the above ground biomass [Znrec_gm] of the Zn added with the green manure Zn derived from the soil and fertilizer in the aboveground biomass [Zndsoil]}and soil parameter (DTPA-extractable Zn from soil) were made at grain maturity. Effect sizes of the experimental factors and their significant interactions are indicated as F-values alongside with the statistical significance level. The interactions of the factors A×D, B×C, B×D, C×D, A×B×C, A×B×D, A×D×C, B×C×D, A×B×C×D were not significant in any of the 11 ANOVAs and thus these results are not listed.