The optimum seed rate (kg/ha) for cultivation of hybrid rice is about -

Correct option is A

· Correct answer: (a) 15
· The optimum seed rate for hybrid rice cultivation is around 15 kg/ha. This rate ensures sufficient growth while minimizing competition between plants.
Other options:
· (2) 25: Higher than the recommended seed rate for hybrid rice.
· (3) 35: Too high for hybrid rice cultivation.
· (4) 45: Excessive seed rate for hybrid rice.