Soil probes are instruments used to collect samples of soil from below the surface for analysis. They are commonly used in agriculture, environmental science, and geology to study the composition, structure, and properties of the soil. Soil probes come in a variety of designs, including hand-held tools, mechanical devices, and automated systems. They are typically inserted into the ground to a certain depth to collect soil samples, which are then analyzed in a laboratory to determine things like nutrient levels, moisture content, and soil texture. Soil probes are essential for understanding and managing soil health, fertility, and quality for various applications.