The correct options are
A Ploughshare
C Irrigation
D Transplantation
Ploughshare, irrigation and transplantation are the various ways to increase production of crops. Ploughshare is an iron tool that is used after the Earth is tilled and is ready for the seeds to be planted. Irrigation is a process by which a controlled amount of water is provided to the plants. Transplantation, on the other hand, is a process of implanting a certain living tissue in another part of the plant or another plant or part.