E (a)   ploughing of land can cause a large amount of soil erosion.

Mining waste may contain p (a)   substances that contaminate the soil.

T (a)   is a method of creating flat strips of land by cutting a series of steps into hill slopes.

A p (a)   is a piece of land in a low-lying area reclaimed from a body of water by building dikes and drainage canals.

Price m (a)   is the way in which prices for goods and services are set based on their demand and supply.

A nature r (a)   is an area where land is carefully managed to protect its wildlife, plants and other natural features.

Creating land by draining waterlogged areas such as swamps and marshes, and filling them with sand to form dry land is called l (a)   .

The watering of crops through artificial ways is known as i (a)   .

E (a)   is a method of reclaiming land from the sea.