Fig. 2.

Interactive effects of planting density and nitrogen application rate on photosynthetic rate, intercellular CO₂ and water use efficiency. In treatments, F1 is showing low nitrogen application rate 120 kg ha⁻¹, F2 is showing high nitrogen application rate 180 kg ha⁻¹, LD is showing low planting density (8 plants m⁻²), MD is showing medium planting density (10 plants m⁻²) and HD is showing high planting density (12 plants m⁻²). In graph; S1 shows seedling stage, S2 is showing squaring stage, S3 is showing blooming stage and S4 is showing maturity stage. The same letters are not significantly different using least significance difference test (LSD) at 0.05 probability level and bar values above mean values are the LSD values.