Desiccation cracks are fissures that form in soil or other materials when they lose moisture and shrink. This process typically occurs in dry environments or during periods of drought, where the evaporation of water causes the surface to contract. The cracks can vary in size and shape, often resembling a network of polygons. These cracks are commonly observed in clay soils, which are particularly prone to shrinkage. Desiccation cracks can impact agriculture by affecting soil structure and water retention, making it essential for farmers to monitor moisture levels to maintain healthy crops.