In Surface irrigation, water from a source such as rivers, pipes, dams, canals e.t.c. floods the soil surface. Surface irrigation uses a lot of water compared to other irrigation methods. It could also drain nutrients beyond the reach of the plant roots. If the water is excessive, it could cause damage to the plant. However, surface irrigation is used extensively in rice farming. This is because the permanent flooding acts as a natural pest control method and rice can survive waterlogged soil.