OBJECTIVE FORESTRY

Detailed explanation-1: -Answer: This is because top-soil is rich in minerals and humus. The plant roots grow in the top-soil.

Detailed explanation-2: -There are generally a high concentration of roots in topsoil since this is where plants obtain most of their vital nutrients. It also plays host to significant bacterial, fungal and entomological activity without which soil quality would degrade and become less suitable for plants.

Detailed explanation-3: -A HORIZON-This is the layer that we call “topsoil” and it is located just below the O Horizon. This layer is made up of minerals and decomposed organic matter and it is also very dark in color. This is the layer that many plants roots grow in.

Detailed explanation-4: -We plant seeds for plants to grow in the topsoil. It is the topmost layer of soil. Plants get minerals and organic matter or humus required for their growth from this layer.

Detailed explanation-5: -Dirt is what you find when you excavate a basement or attic. No plants thrive in dirt. Topsoil, on the other hand, contains natural organic matter from leaves, grasses, weeds and tree bark that can help sustain plant life. However, topsoil is not enriched or amended at all, which limits its use as a growing medium.