Figure 7. Shoot N content (g N plant^–1) for an older (‘Pride 5’) and a newer (‘NK N25-J7’) maize (Zea mays L.) hybrid grown at high N (HN), low N (LN), and high N switched to low N at 1 wk presilking (HLN₁) at (a) silking and (b) physiological maturity. Different letters indicate significant differences between hybrids per N level (p < 0.05) by t test.