It determines the successive arrangement of different crops in a particular order over several years in the same growing space. This process helps maintain nutrients in the soil, reduce soil erosion, and prevents plant diseases and pests.

From the word it self it determines the use of different crops one by one on single land so that the nutrients consumed by 1^st crop are not required for 2^nd crop and will give time to the soil for replenishing itself with those exhausted and the remaining nutrients will help in the growth of 2^nd crop.