Crop and Environment MCQs-2

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

2. Maximum canopy photosynthesis primarily occurs under ________

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

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

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

6. Evapotranspiration from crop canopy includes __________

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

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