- Tobacco is harvested 90-120 days after transplanting, depending on variety and purpose. - Types of Harvesting: - Priming: Harvesting mature leaves from the bottom upward at intervals of 7-10 days.
- Stalk-cutting: Entire plant is cut at the base when all leaves are mature.
- Proper curing methods like air-curing, flue-curing, or sun-curing are used to improve tobacco quality.
Transplanting:
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 ___________.