Soil/sɔɪl/ Definition 1 of 3Pro Tip 1/3Plant Growth Soil is essential for growing crops and plants; it holds roots and provides nutrients. Without rich soil, the gardener's flowers wouldn't bloom well. Pro Tip 2/3Soil Quality Describing soil can indicate quality: 'fertile' means good for planting, 'poor' means bad. The fertile soil of the valley ensures a bountiful harvest. Pro Tip 3/3Environmental Concern Soil erosion is a serious issue, leading to loss of fertile land and pollution. Farmers planted trees to prevent soil erosion on the hillside.