Tropical Zone

The plants that are primarily grown for their medicinal values are known as medicinal crops. For example: Aloe vera, Lemongrass, Tulsi, Mint, Turmeric.

These crops are cultivated for the production of fibers are known as fiber crops. For example: jute, cotton, hemp, kenaf and flax.

The distance from the surface of the soil to the placement of the seed for sowing purposes in the soil is known as sowing depth.