What is intercropping system?

Growing more than one crop in the same area in rows of definite proportion and pattern. The most common goal of intercropping is to produce a greater yield on a given piece of land by making use of resources that would otherwise not be utilized by a single crop. Intercropping strategies include planting a deep-rooted crop with a shallow-rooted crop, or planting a tall crop with a shorter crop that requires partial shade .Numerous types of intercropping are mixed intercropping, row cropping, relay cropping, etc.