Step 1: Understanding the Concept:
The seed rate of okra (Abelmoschus esculentus) varies depending on the sowing season, plant canopy size, and spacing.
Step 2: Detailed Explanation:
- For the rainy season crop, okra plants exhibit vigorous vegetative growth and branching. Consequently, a wider spacing of \( 60 \times 30 \) cm is maintained, requiring a lower seed rate of 8-10 kg/ha.
- In contrast, the spring-summer crop has a compact growth habit with minimal branching. Thus, a closer spacing of \( 45 \times 15 \) cm is kept, which increases the seed rate requirement to 18-22 kg/ha.
Step 3: Final Answer:
Therefore, the ideal seed rate for the rainy season okra crop is 8-10 kg/ha.