The correct options are
B Sprinkler
D Drip System
∙ Traditional methods of irrigation such as moat and chain pump are useful only in plains, where the terrain aids the flow of water into the fields.
∙ The drip irrigation has the potential to save water and nutrients by allowing water to reach slowly to the roots of plants, either from above the soil surface or buried below the surface and prevent the leaching of water and nutrients in uneven land during irrigation.
∙ Sprinkler system helps in covering large areas of even land and spread water equally even on uneven lands.
Therefore the sprinkler and drip system of irrigation is very efficient in uneven land.