Difference between topsoil & compost

Written by gina lay
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Difference between topsoil & compost
Topsoil and compost hold nutrients that keep plants and grass alive. (garden image by memorialphoto from Fotolia.com)

Compost and topsoil are both beneficial for a garden. As the first layer of soil, the topsoil is the organic layer in which grass and plants have most of their roots, and where the vital nutrients come from to sustain plant life. If those nutrients diminish, the entire lawn or garden may get depleted from lack of nourishment and die. Composting restores nutrients, improves the soil and helps the environment by keeping grass and plants healthy and alive.

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Making Compost

Compost is made of partly broken down organic matter and debris from the garden, such as grass clippings and brown leaves. The green debris carries oxygen and the brown carries carbon. Compost differs from topsoil, which is made of clay, sand and other matter of the earth. The materials in compost are organic and can be easily tilled into the soil to give added nutrients to the soil. "Organic Gardening" suggests making compost piles in two ways, hot and cold. Cold composting take less effort and can be done in the back yard. Hot composting takes more effort and time.

Benefits of Compost

Compost can give a lawn the nutrients it has lost and restore the fresh look of a lawn. It is a cheap way to fertilise a lawn. Unlike topsoil, compost is made up of matter that is decayed from plant sources. Adding worms to compost produces high organic matter. Compost embellishes the soil by encouraging the growth of micro-organisms that break down matter, creating humus, and decreases the need for fertilisers, pesticides and water. Composting helps clean dirty soil.

Benefits of Topsoil

Topsoil holds vital nutrients necessary to keeping plants alive by absorbing the gas and water needed for growth. The matter on the top of the soil distributes the organic matter through the upper inches of the topsoil. The rich soil is refereed to as humus and is very fertile soil beneficial for planting. Topsoil retains the nutrients in plants, it also stops or prevents erosion from rain and wind. It is the most fertile and most important part of the soil.

Making Topsoil

Topsoil is the crust of the Earth's outer layer about 2 to 8 inches deep. It serves a very important purpose to the Earth giving plants the nutrients they need to live. All topsoil is made of different ingredients that vary by location and is different from compost because of the pH level. A pH level greater than 7 should not be used for gardening. Topsoil should look moist and fall apart easily. Unhealthy topsoil appears grey and dry, which will lead to unhealthy crops. The colour of topsoil should be dark brown, unlike finished compost which appears black.

Laying Topsoil

Measure the area where topsoil will be needed for the garden or lawn. The topsoil should be fertile and free of debris. A good topsoil has an even mixture of clay, sand and silt. Having too much of one element can cause problems with growing. Water the garden or lawn to promote weeds to grow. Use a herbicide to destroy the weeds and repeat after 14 days. Give the area time to settle and the herbicide time wear off. Lay 4 to 5 inches of topsoil on the garden or lawn and use a rototiller. Use a rake to smooth out the area.

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