What is inter cropping

Intercropping is a multiple cropping practice involving growing two or more crops in proximity. The most common goal of intercropping is to produce a greater yield on a given piece of land by making use of resources or ecological processes that would otherwise not be utilized by a single crop.
For example, plants that are prone to tip over in wind or heavy rain (lodging-prone plants), may be given structural support by their companion crop.
Examples of intercropping strategies also include planting a deep-rooted crop with a shallow-rooted crop, or planting a tall crop with a shorter crop that requires partial shade.