Peas are low in calories, but rich in nutrients (1 cup of peas contain just 118 calories). They are rich in fibre which makes you feel full for a long time, and this helps in making you eat less. Peas also have a relatively shallow root system which can help prevent erosion of the soil, and once the peas have been picked, the plant remainders tend to break down relatively easily for soil replenishment. Finally, rotation of peas with other crops has been shown to lower the risk of pest problems. These environmentally friendly aspects of pea production add to their desirability as a regular part of our diet.