Flag Leaf Photosynthesis and Stomatal Function of Grain Sorghum as Influenced by Changing Photosynthetic Photon Flux Densities

Figure 5

Ratio of to at Growth Stages 6 and 7 of grain sorghum grown on a Tunica clay soil near Elizabeth, MS, at three levels of added N-fertilizer (0, 112, and 224 kg N ha⁻¹) with decreasing PPFD. For GS6 means are of three plants, two hybrids (83P17 and DKS54-03), two years (2014 and 2015), and three N-fertility treatments. For GS7 means are separated by year. Mean error bars set at .