(a) The stagnant water in the scheme encourages the breeding of snails and mosquitoes which causes diseases to people
(b) Weeds growing in the canals and Siltation interfere with the flow of water into the fields. The farmers have to spend extra money and time to dredge the canals
(c) Diseases and pests attack the crop lowering the yields. The quelea birds, which move in large flock, feed on the rice grain leading to a major loss of the crop
Faimus answered the question on March 19, 2018 at 12:37
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