Soil type and structure can significantly impact irrigation scheduling, as they affect water retention and drainage. Sandy soils, for example, drain quickly and may require more frequent watering, while clay soils retain water longer and may require less frequent watering. Additionally, soil salinity and pH levels can also impact plant water uptake, and must be considered when developing an irrigation schedule. By understanding the characteristics of the soil, farmers and gardeners can optimize their irrigation schedules to ensure plants receive the right amount of water.