Canal irrigation leads to the ground around it becoming an productive because :
a)the water supply is irregular.
b)the water supplied is free of minerals.
c)water logging takes place.
d)none of the above.
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Alkaline salts may come up to the ground in areas where canals are used for irrigation. This happens when the water table is only a few feet below the ground. This salt when it mixes with the soil makes it unproductive.
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