Table I. Summary of correlation analysis (correlation coefficient and significance levels) between CN and parameters measured under low-N conditions in six maize genotypes in soil mesocosms at 28 d after planting and in the field in South Africa and the United States in 2011.
*P < 0.05, **P < 0.01.
| Parameter | Mesocosms | Field |
|
|---|---|---|---|
| South Africa | United States | ||
| Canopy photosynthesis rate | −0.51* | – | – |
| Leaf photosynthesis rate | −0.58* | −0.57* | – |
| Tissue N content | −0.48* | −0.36* | −0.36* |
| Shoot dry weight | −0.48* | −0.70** | −0.47* |