Page 1 : Q4., , Qs., , A., , How does deforestation cause soil erosion ?, , Deforestation makes the soil loose .So that it is easily carried away by wind or water ,, because the roots of plants are not there to hold the soil together., , What is soil erosion?, , Loss of top soil by wind, water , animals and human activities is called soil erosion., , Long Answer Questions :, , qi., , A., , Q2., , Q3., , A., , List the human activities that bring about soil erosion ., 1. Construction activity that clears away farm land., 2. Deforestation, 3. Overgrazing by domestic animals., 4. Ploughing of farmland on hill slopes and leaving these bare., How is soil conservation done ?, 1. Planting cover crops on bare land., 2. Making embankments along river banks., 3. Terracing hill slopes., 4. Afforestation., Explain the soil profile., 1. Bottom layer or bed rock : It is made up of large pieces of rocks deep inside the earth., 2. Middle layer or sub soil : It is made up of smaller bits of rocks., 3. Top layer of soil or top soil : It is made up of fine particles of sand and clay, , mixed with humus.