Fig. 2.

Variation of nitrogen in (A) leaf blades, (B) stems plus chaff, (C) grain and (D) above-ground parts from anthesis to maturity in treatments A11 and A10. Data were extrapolated from sampling three replicates of average main shoots (see Methods). A point-by-point ANOVA was carried out for each curve and asterisks indicate a significant difference at the 5 % level (Newmann–Keuls test).