Definition: Unirrigated is a type of irrigation system that allows water to flow through plants without draining them. This method involves planting crops in soil that has been well-drained, and then applying water through thin pipes or hoses to ensure that the soil is moist but not saturated with water. The goal of unirrigation is to conserve water by allowing plants to receive adequate amounts of water during their growth period, reducing the need for irrigation systems that can be costly and inefficient in many regions.