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Soil 101

How well do you understand your soil? It’s more than just dirt, and the more you learn about soil, the better you’ll be able to care for it to ensure a stunning landscape, healthy lawn and productive garden.

All About Soil

The four elements of soil are minerals, water, air and organic matter. Different combinations of the four elements create the four main categories of soil: sand, silt, clay and loam. Of course, we all want loam – that rich, vibrant soil thriving with beneficial bacteria and with a smooth but crumbly texture ideal for root growth. Unfortunately, true loam soils are rare, especially around homes where topsoil was removed and heavy machines compacted the remaining soil during construction or renovation. Most of us have clay soil, which has finer particles that compact easily into a dense mass. Clay soils also retain more water and can easily become too soggy or waterlogged for healthy plants. But just because your soil may be clay, it doesn’t have to stay that way!

Improving Soil

Improving soil is actually quite easy. All soils are improved by adding minerals and organic material that help balance out the overall components of the soil’s structure.

Before adding minerals, test the soil to determine its pH (acidity or alkalinity) and determine any mineral deficiencies. Lime decreases soil acidity, gypsum adds calcium and helps break up heavy clay and sulfur increases acidity. Other soil amendments to add to a clay soil include sand, cottonseed meal and peat moss, all of which will help improve the drainage and structure.

Organic matter refers to plant or animal materials decomposed into compost or “humus.” This residue comes from leaves and other plant materials, as well as certain animal wastes. Grass clippings, paper and certain types of decomposing food can also be ideal compost. The quality depends on the origin of the original biodegradable matter. Many people make their own compost using bins in which materials are mixed until they decompose. Others purchase finished compost. When compost is added to soil, it releases nutrients that are vital for healthy plants, and healthy bacteria and microbes will thrive in organically-rich soil.

The Magic of Mulch

Mulching is a simple way to add biodegradable materials to the soil. Evergreen needles, tree leaves, lawn clippings, chicken manure, etc., can be worked into the soil to decompose. This process improves the air spaces between the soil particles and rearranges the sand, silt and clay to produce optimum soil structure, improving the water retention and drainage balance and making nutrients available to plants.

When soil has proper structure and sufficient nutrients for healthy plants, optimum health has been achieved, and great soil will lead to great landscaping, turf and gardens. Congratulations and keep on growing!

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