Why Soil Health Matters - The Living World Beneath Your Feet!

Charlotte Weidner | February 14, 2026

“For whatsoever from one place doth fall, Is with the tide unto an other brought: For there is nothing lost, that may be found, if sought.” - Edmund Spencer ‘The Faerie Queen’

Soil! What is this stuff and just why is it so important? It seems like dirt is everywhere, so why all the fuss?

Well, hold onto your garden boots! Soil is much more than just dirt … Healthy, fertile soil is ALIVE!

Soil Health 101
Vital Topsoil Vitality
Soil Supports Life
Soil Conservation at Home
Enrich the Earth!

Soil Health 101

We as living things eat living things, be that plant or animal in origin. If one follows the food web down to the root of it all - it’s the plant family that is the staple source of nutrition for almost all other food that is topside of topsoil!

So where do plants get their food? … The soil!

There is an entire ecosystem that lives beneath your feet! In turn, it supports entire ecosystems above ground too! Without the soil, we’d have a literal desert or fields of stone and rock outside!

That thin layer of topsoil that covers the rocky core of this blue and green bubble we’re floating on is only about 5-10 inches deep! Everything that supports our entire ecosystem and food web - is grown right there in less than a foot of the Earth.

Black gold indeed! Once you get over that moment of existential crisis the above revelation may have had on you, let's talk about what soil is all about!

Vital Topsoil Vitality

Topsoil is composed of about 45% mineral particles, 25% air and 25% water, and only 5% organic matter. But when combined, these hold all the nutrients and moisture that support plants and animals of all kinds.

When the last glaciers in North America melted about 12,000 years ago, they left behind ground rocks and minerals and loads of trapped organic matter. These starter or ‘parent materials’, combined with topography, time, climate, and organisms in the soil are the five factors that are part of soil formation.

Minerals, silt, sand, and clay form as stone breaks down and becomes mixed, churned, and slowly makes its way to the surface from the subsoil. Mixed and further moved around by roots and organisms that live in this thin, active layer of dirt!

It can take 500 years for natural processes to create a single inch of soil
Composting, mulching, and earthworms help speed up this process
Scientists have identified over 70,000 different kinds of soil right here in the United States!

There are also physical and chemical factors that work together in order to form soil. Water in the form of rain, rivers, waves and tidal action, plus freezing and thawing, all further break down what the wind and sun, plus temperatures from hot and cold contraction.

Soil is further broken down with the aid of biological activity in the form of -

Root expansion and formation breaking apart subsoil and adding oxygen
Lichens secrete acids and break down rocks and trees
Fungal and bacterial decomposition
Organisms burrowing in, moving through, and eating things in the soil

Home to billions of bacteria, fungal strands, microscopic and macroscopic organisms, and more, the average teaspoon of soil has around 1 billion individual microscopic cells, thousands of protozoa, and 10,000 different types of organisms living in it!

All of these organisms help break down those rocks, sand, and organic matter into rich earth!

Soil Supports Life

The lessons we learned during the Great Dust Bowl have proven beyond all reasonable doubt that we need to care for this essential top layer! With only a single layer of topsoil to support almost all life on earth, it’s important to have healthy soil! After all, all our food, and our food's food, grow in that thin layer!

Soil Is Important Because…

Holds water that dissolves nutrients
Makes those nutrients available for plants' roots to use
Filters water before it runs into streams, lakes, and oceans
Keeps chemicals from flowing into our water sources
Cycles and stores nutrients
Home to countless living organisms
Provides stability and structure to everything above ground
Supports all plant growth and biodiversity
Holds heat from the sun while insulating plant roots and animals in the soil
Contributes to air quality
Provides the nutrients plants need (and that we need as a result)
It grows our fiber and building material
Sequesters carbon and holds heat
Recycles and filters water
Supports our homes and the roads we drive on
It’s where we play and relax and the recreation areas we enjoy
Sequesters a quarter of all human CO2 emissions each year

Sounds pretty vital, doesn’t it?

But this vital layer is still taken for granted. Almost 36 billion tons of soil has been lost every year due to water, deforestation, and other changes!

Soil Conservation at Home

What would we do without soil? Well, for starters, we’d have to endure famine, drought, flooding, and illness! Due to excessive chemical use, wind and water erosion, depletion from over-farming, and climate change, we have lost nearly half of the world’s fertile, workable or usable topsoil.

While we may be losing topsoil to the actions of water and wind, it has to go somewhere, right? Nothing is truly lost until we can’t get it back. So get out there and start helping keep the soil we still have healthy, alive, and in place!

Want to dig a bit deeper into soil conservation and be a part of helping enrich the world beneath your feet? Here are a few easy steps that you as a gardener can do to help out right in your own backyard.

Control erosion - Plants, walls, mulch, physical barriers, etc.
Crop rotation in the veggie garden/agriculture
Grow with the contours of the soil
Cover crops in the vegetable garden or plant groundcover in the landscaping bed
Create a Compost Bin/Compost area
Slow water runoff and soil erosion on steep hillsides and water banks
Create a Rain Garden to catch water runoff
Plant or Leave Buffer zones - untouched strips of grass, trees, or shrubs
Build terraces or stepped beds into hillsides
Fill areas of exposed soil around your home - plants, mulch, Rock Gardens, etc.
Underplant downspouts with plants, rocks, River/Rain gardens, or bark chips
Use organic fertilizer, pesticides, and herbicides
Prevent soil compaction that leads to erosion
Covering bare, exposed ground with 3-4 inches of Arborist bark chips or mulch

Enrich the Earth!

Anywhere there is soil - both rural areas or urban areas, anything you do to help enriches our entire world! So get involved in the husbandry of this thin, yet essential layer of life that covers our world.

You are what you eat, and you are what your food eats too! So get outside, stop erosion, plant a garden, and enrich the ground! For healthy living and as the backbone of food security, you can see why it’s so important we pay attention to the ground beneath our feet!

Happy Planting!

Head over to your own County Extension Office or to your State USDA Natural Resources Conservation Services for soil surveys, soil education, and soil information specific to your area at www.nrcs.usda.gov/wps/portal/nrcs/site/soils/home/

Previous Next

Frequently Asked Questions

How do I know if my garden soil is healthy or struggling to support plant life?

Healthy garden soil should be dark in color, crumble easily in your hand, smell earthy, and show signs of earthworm activity when you dig down 6 inches or so. Struggling soil often appears pale, compacted, or crusty on the surface, drains poorly or dries out too fast, and produces stunted or yellowing plants even with regular watering and feeding. A simple home test is to dig a 12-inch hole, fill it with water, and see if it drains within an hour, which indicates good soil structure and aeration. Start by getting an inexpensive soil test through your local cooperative extension service to pinpoint pH and nutrient deficiencies, then amend with compost to begin rebuilding that vital organic matter layer.

How do I choose the best location in my yard for healthy, productive garden soil?

Choosing the right garden location starts with finding a spot that receives at least 6 to 8 hours of direct sunlight daily, since light drives plant growth and supports the microbial activity that keeps soil alive and productive. Look for areas with good natural drainage, as waterlogged soil suffocates the organisms and root systems that build soil health over time. Avoid low-lying spots where water pools after rain, and steer clear of areas beneath large trees where root competition and heavy shade will work against you. Start by digging down 10 to 12 inches in your chosen spot to assess soil texture and drainage, then amend with compost before planting to give your garden the best possible foundation.

Why does fertile soil matter so much for growing strong, resilient plants?

Fertile soil is the foundation of every thriving garden because it delivers the nutrients, moisture, and oxygen that plant roots depend on, all concentrated in just 5 to 10 inches of living topsoil. That thin layer supports an entire underground ecosystem of organisms that break down organic matter and make nutrients available to your plants. To build and protect this resource at home, add compost regularly, apply mulch to prevent erosion, and avoid compacting your soil by staying off planting beds after heavy rain.

How do I improve poor garden soil using compost or other organic matter?

Improving poor garden soil starts with adding 2 to 4 inches of compost worked into the top 6 to 8 inches of your existing soil, ideally in fall or early spring before planting season begins. Organic matter like aged compost, leaf mold, or well-rotted manure feeds the microbial life that makes nutrients available to plant roots, and repeated applications over several seasons will dramatically transform even compacted clay or sandy soils. Mulching garden beds with wood chips or shredded leaves also breaks down over time and contributes organic matter from the top down. Start a compost pile now, apply a fresh layer of organic matter each season, and let the living ecosystem in your soil do the heavy lifting.

How do I test my soil and find out which nutrients it is missing?

Testing your soil is straightforward and highly recommended before planting or amending your garden beds. Purchase an inexpensive home test kit from your local garden center, or for the most accurate results, send a sample to your local cooperative extension office, which typically costs between $15 and $30 and will provide a detailed breakdown of pH, nitrogen, phosphorus, potassium, and micronutrient levels. The best times to test are in fall after the growing season or in early spring at least a few weeks before planting, giving you time to amend and adjust. Once you have your results, follow the specific recommendations provided to add targeted amendments like lime to raise pH, sulfur to lower it, or compost and fertilizers to address nutrient deficiencies.

How do I fix heavy clay soil so roots can grow and water can move through it?

Heavy clay soil can be improved by working 3 to 4 inches of compost into the top 8 to 10 inches of soil, which helps break apart the dense particle structure and create the air pockets roots need to thrive. Adding coarse sand or perlite alongside compost further improves drainage, but avoid adding sand alone as it can create a concrete-like mix without organic matter present. Fall is an ideal time to amend clay soil so winter freeze-thaw cycles can help continue breaking it apart. Top-dress with mulch each season and introduce earthworms where possible, as their tunneling naturally aerates compacted ground over time.

How do I improve drainage in garden soil that stays soggy or waterlogged?

Soggy, waterlogged soil suffocates roots by pushing out the oxygen that plants and soil organisms need to thrive. The most effective fix is to work 3 to 4 inches of coarse compost or aged wood chip mulch into the top 8 to 10 inches of soil, which improves structure and pore space over time. For severely compacted or clay-heavy areas, consider installing raised beds at least 12 inches deep filled with a quality loamy mix, or dig a French drain to redirect excess water away from planting zones. Start amending in fall so freeze-thaw cycles can help break down organic matter before spring planting season.

How do I tell if my soil is compacted, and what is the best way to loosen it?

Compacted soil typically reveals itself through puddles that linger after rain, a hard crust on the surface, or when a screwdriver or pencil cannot be pushed 6 inches into the ground with hand pressure alone. Roots struggle to penetrate compacted layers, so you may also notice stunted, yellowing plants even when watering and fertilizing regularly. To loosen compacted soil, work in 2 to 4 inches of compost or aged organic matter and till to a depth of at least 8 to 10 inches, ideally in fall or early spring when soil is moist but not waterlogged. Adding earthworms, reducing foot traffic, and applying a 2 to 3 inch layer of mulch over planting beds will help maintain loose, healthy soil structure long term.

How much compost, manure, or leaf mold should I add to my garden beds each season?

A general rule of thumb is to incorporate 2 to 3 inches of compost, aged manure, or leaf mold into your garden beds each spring before planting, working it into the top 6 to 8 inches of soil. In fall, you can add another 2-inch layer as a top dressing to decompose over winter and feed soil organisms through the colder months. Because healthy topsoil is only 5 to 10 inches deep and takes centuries to form naturally, consistent seasonal amendments are the single most impactful thing you can do to build long-term fertility. Start with a soil test from your local extension service to dial in exactly what your beds need before you amend.

How do I know if my soil pH is too high or too low for the plants I want to grow?

The easiest way to know your soil pH is to test it using an inexpensive home test kit or by sending a sample to your local cooperative extension office, which will give you a precise reading on the 0-14 pH scale. Most garden plants thrive in a slightly acidic to neutral range of 6.0 to 7.0, while blueberries and azaleas prefer a more acidic 4.5 to 5.5, and some vegetables like asparagus tolerate up to 7.5. If your pH reads too high, work elemental sulfur into the soil to lower it; if it reads too low, apply ground limestone to raise it. Test your soil every 2 to 3 years in spring before planting, and always match your amendments to the specific needs of the plants you intend to grow.