Crop and Environment MCQs-2

1. In plants, water-use efficiency (WUE) under elevated CO₂ may _________

2. When plants are exposed to temperatures above the optimum level, it increases ___________ of plants

3. Evapotranspiration from crop canopy includes __________

4. The solar constant at the top of the atmosphere is approximately _______________ W m⁻²

5. Within a dense crop canopy, temperature is generally ___________

6. __________ is the primary pigment responsible for light absorption in photosynthesis

7. Approximately ______ of total incident solar radiation is Photosynthetically Active Radiation (PAR)?

8. Biomass production is proportional to intercepted photosynthetically active radiation (PAR) multiplied by __________

9. Ozone exposure significantly reduces crop productivity by interfering with plant physiology

10. Maximum canopy photosynthesis primarily occurs under ________