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What will happen if 

(i) excess amount of fertilisers is added to a green lawn? 

(ii) salt is added to cut pieces of raw mango?

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(i) It degrades the soil fertility. As excess of salt will make the soil hypertonic, due to which the water from roots will move out through osmosis. And, as a result the crop will die. 

(ii) It is based upon on the concept of osmosis. Salt enter the cell and water will eventually move out of the cell to maintain the osmotic level. This prevents the mango from rotting.

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