Soil solarization is a way to make the soil in your garden healthier. It works by using the sun's heat to help kill bad microorganisms, weeds, and other pests in the soil. This helps to improve the soil so that plants can grow better. To do soil solarization, you have to cover the soil with a clear plastic sheet or tarp. This traps the sun's heat and cooks the bad things in the soil. That way, the soil will be healthier, and your plants will be happier!