- Tobacco thrives in light, well-drained loamy or sandy loam soils with a pH range of 5.5 to 7.5.
- The crop requires a warm and humid climate, with temperatures ranging between 20-30°C.
- It needs 500-1000 mm of evenly distributed rainfall throughout the growing season.
- Bright sunny days and dry weather during maturity enhance the quality of the leaves.
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 ___________.