- Organic Manure: 25-30 tons/ha of well-decomposed farmyard manure (FYM).
- Chemical Fertilizers:
- Nitrogen: 120 kg/ha (split doses).
- Phosphorus: 60 kg/ha.
- Potassium: 90 kg/ha.
- Micronutrients like Zinc and Boron improve rhizome quality.
Explain the construction of a spherical wavefront by using Huygens' principle.
The slope of the tangent to the curve \( x = \sin\theta \) and \( y = \cos 2\theta \) at \( \theta = \frac{\pi}{6} \) is ___________.