Question

Difference beween productive and protective canals

Answer 1

Protective canals. Productive canals are those which are introduced with an idea of recovering all the expenditure, incurred during the construction. Differentiation between protective irrigation and productive irrigation : Protective irrigation- (i) It protects the crops from adverse effects of soil moisture .

Answer 2

productive -After full development of the canal system revenue obtained from the cultivators is such that it is more than the maintenance expenditure. This exceeding amount of revenue is so adjusted that it is about 2 per cent of the cost of the canal system. With this rate the total cost of the project will be recovered in about 50 years. Thus the productive canals are that which adds to the wealth of nation directly.

Protective canal is one which is not actually remunerative as the previous type. The construction work of this type of canal and its development may be started during a famine. It helps in giving employment to the cultivators at the time of the famine, thus the protective canals is a sort of relief work.