Question

Advantage and disadvantage of replacing Persian wheel of irrigation with tube well

Answer 1

-More efficient / faster / does not need to rest

-For larger area / more water / goes deeper

-Regular supply / can be used at any time of year / continuous -Less labour required

-Cleaner water

-Reduces waterlogging and salinity

Disadvantages of tube well

-Expensive / cannot be used by poor farmers

-Reduces groundwater / lowers water table