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www.doityourself.com/stry/topsoil-facts-what-its-made-of

Understanding the composition of topsoil, as well as what some of the best uses for it, is important to maintaining the health of your lawn and/or garden look its best. The Components of Topsoil. Topsoil is an important part of any kind of lawn or garden because of its contents. Topsoil has high amounts of organic matter as well as microorganisms.

en.wikipedia.org/wiki/Topsoil

Topsoil is the upper, outermost layer of soil, usually the top 5–10 inches (13–25 cm).It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs. Topsoil is composed of mineral particles, organic matter, water, and air. Organic matter varies in quantity on different soils.

www.nationalgeographic.org/encyclopedia/soil-composition

Soil composition is a mix of soil ingredients that varies from place to place. The Natural Resources Conservation Service (NRCS)—part of the U.S. Department of Agriculture—has compiled soil maps and data for 95 percent of the United States. The NRCS has found that each state has a “state soil” with a unique soil “recipe” that is ...

www.dummies.com/home-garden/gardening/how-to-assess-soil-composition

The health of garden plants depends on the soil’s composition — the proper balance of mineral pieces, organic matter, air, and water. Knowing the type of soil you have can help you choose techniques to enhance its good qualities. The best garden soil should have proper balance of minerals, water, organic matter, and air. The […]

www.ctahr.hawaii.edu/mauisoil/a_comp.aspx

Soil Composition. Soil composition is an important aspect of nutrient management. While soil minerals and organic matter hold and store nutrients, soil water is what readily provides nutrients for plant uptake. Soil air, too, plays an integral role since many of the microorganisms that live in the soil need air to undergo the biological ...

en.wikipedia.org/wiki/Soil

Soil is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life. Earth's body of soil, called the pedosphere, has four important functions: . as a medium for plant growth; as a means of water storage, supply and purification; as a modifier of Earth's atmosphere; as a habitat for organisms; All of these functions, in their turn, modify the soil and it...

www.earthsoils.com/soil-composition

Soil Composition and Crop Quality This chart reflects a tremendous amount of information available for your understanding of the composition of a healthy productive soil environment. It is based on scientific research accumulated over years of observation on productive soil types throughout many growing areas of the country. The approach to obtaining this insight on…

www.gardeningknowhow.com/edible/vegetables/vgen/vegetable-garden-soil.htm

If you are starting a vegetable garden, or even if you have an established vegetable garden, you may wonder what is the best soil for growing vegetables.Things like the right amendments and the right soil pH for vegetables can help your vegetable garden grow better. Keep reading to learn more about soil preparation for the vegetable garden. Soil Preparation for a Vegetable Garden

study.com/academy/lesson/what-is-topsoil-definition-composition-uses.html

Topsoil, classified as the A or the O horizon of soil, is the part of the soil where all of the biological activity happens. It smells quite earthy and the darer the topsoil the more nutrient-rich ...

www.nrcs.usda.gov/wps/portal/nrcs/soilsurvey/soils/survey/state

Soil Survey / Soil Surveys by State. Stay Connected. Loading Tree... Soil Survey. Soil Survey - Home Soil Surveys by State Partnerships National Cooperative Soil Survey Publications Soil Classification Soil Taxonomy Tools & Data Maps ...