Farmers use agricultural plastic tarps to protect crops from rain and wind by covering the crops with the tarps, which act as a barrier against the elements. These tarps are made of durable materials that can withstand rain and wind, preventing water from directly hitting the plants and reducing wind damage. They are often used in conjunction with a framework of poles or hoops to create a tunnel-like structure over the crops. This not only shields the plants from rain and wind but also helps in maintaining temperature and humidity levels, promoting optimal growing conditions. In some cases, farmers might also use the tarps to cover the soil to prevent erosion and retain moisture, indirectly protecting the crops by preserving the quality of the soil.