Which of the following sources of water is least useful for irrigation purposes? by Sunday | Jun 12 | Agricultural Science WAEC | 0 comments A. sea B. river C. lake D. borehole Correct Answer: Option A – sea Users Also Read These:In which of the following activities is land not…SS2 Lesson Note on the Irrigation System: Meaning;…A quantity of hot water at 100ºC is added to 400g of…A quantity of water at 20ºC is mixed with another…An immersion heater rated 2.0A; 240V is used to boil…