in relay cropping the successive crop is sown before the harvesting or removal of the previous crop. By doing this time can be saved between two croppings. This can be practiced for annual, biennial and perennial crops.

Growing crops one after another on a piece of land is called crop rotation. This can be done by growing the same crop or different crops. The crops may be annual or perennial. Annual crops are rotated according to climatic and seasonal changes. Rotatons such as rice- whear and maize- wheat- mung are examples of annual crop rotations with seasonal crops. Papaya – Pineapple- sugarcane, are an example of rotating biennial crops and rubber followed by coffee, or orange followed by guava are examples of perennial crops.