Distinguish between the natural growth of population and migratory growth of population.
State two main features of the Japanese method of rice cultivation.
i. Rice is prepared as nursery in the seed - beds and transplanted in late spring to the flooded area.
ii.Paddle wheels, electric and diesel pumps are used to supply irrigation ditches with water.
Name any two products which are transported through a pipeline. Mention two advantages of this method of transport.