Mixed cropping, what kind of mixture of crops are planted in the same plot

Common mixtures include:

• Cereals with Legumes: For example, planting wheat or maize with soybeans or groundnuts. The legume provides nitrogen to the soil, which benefits the cereal crop.
• Tall and Short Crops: Such as planting a tall crop like corn with a shorter, shade-tolerant crop like pumpkins or beans. This maximizes the use of sunlight and space.
• Crops with Different Root Depths: One crop might have shallow roots, while another has deep roots, allowing them to access nutrients and water from different soil layers without competing as much.