Fig. 8.
Relationships between leaf nitrogen content and the rate of flag leaf photosynthesis at the ambient CO2 concentration of 370 μmol mol−1 in Takanari (filled circles) and common Japanese varieties, Asanohikari (filled triangles) and Nipponbare (open triangles), as well as Koshihikari (open circles) grown in 12.0 l pots at the heading stage. Measurements were taken when a panicle of a main stem emerged completely.