Question

how do trees in aforest help to maintain the fertility of soil ?

Answer 1

Trees hold the soil tightly and prevent it form soil erosion, since the upper layer of sil is very fertile , and trees also attracts rain bearing cloud, due to which water availability is maintained ,
In this way foresthelp to maintain the fertility of soil.

Answer 2

1.THEY MAINTAIN UNDERGROUND WATER BALANCE
2.THEY ABSORB EXCESS POTASSIUM AND SODIUM
THESE TWO FACTORS IF NOT CONTROLLED MAKE THE SOIL ALKALINE