Table 1. Experimental design for the different treatment groups.
L, Light only; N, nitrogen only; LN, combined light and nitrogen
| Experiment | Light | Nitrogen |
|---|---|---|
| L1 | + | + |
| L2 | − | + |
| N1 | + | − |
| N2 | + | + |
| LN1 | − | − |
| LN2 | − | + |
| LN3 | + | − |
| LN4 | + | + |
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