Farmers conserve soil through a combination of practices that reduce erosion, build organic matter, and keep the ground covered year-round. The most effective approaches work together: minimizing how much the soil is disturbed, keeping living roots in the ground as long as possible, and shaping fields to slow the movement of water and wind. Switching to no-till farming alone can reduce soil loss by more than 70%.
Reducing Tillage
Traditional plowing flips and breaks up the soil before planting, which loosens the surface and leaves it exposed to rain and wind. No-till farming skips that step entirely. Instead of turning the soil, farmers use specialized equipment that cuts a narrow slot, drops in the seed, and closes it back up. The existing soil structure stays intact, and last season’s crop residue remains on the surface as a protective layer.
The erosion benefits are dramatic. A University of Illinois study found that completely shifting to no-till reduces soil loss and sediment runoff by more than 70%. Even more striking, targeting just the most erosion-prone 40% of a field with no-till achieves nearly the same reduction as converting the entire operation. That makes the practice accessible to farmers who aren’t ready to go all-in. Beyond erosion, no-till preserves the networks of beneficial fungi that live in soil. These fungi colonize plant roots and help them absorb water and nutrients. Conventional plowing physically shreds those fungal networks. Research published in Frontiers in Microbiology found that no-till fields had significantly greater fungal diversity and higher root colonization rates compared to conventionally tilled fields. Those underground partnerships directly support healthier crops.
Cover Cropping
After a cash crop like corn or soybeans is harvested, the field often sits bare for months. Cover crops fill that gap. Farmers plant species like clover, rye, or radishes not to harvest, but to keep living roots in the ground. Those roots hold soil in place, feed soil microbes with sugars they release underground, and scavenge leftover nutrients like nitrogen before they can wash away.
The amount of cover crop growth matters. Research from Washington State University found that fields need at least 890 pounds of cover crop biomass per acre to effectively retain nitrate and deliver meaningful nitrogen benefits to the next cash crop. Below that threshold, the cover crop is better than bare ground but doesn’t pull its full weight. One reason the bar is relatively high: about 90% of cover crop biomass gets consumed by soil organisms. Only the remaining 10% converts into stable organic matter, the carbon-rich material that improves soil structure, water-holding capacity, and long-term fertility.
Despite these benefits, adoption remains low. The 2022 Census of Agriculture found that cover crops were planted on just 4.7% of total U.S. cropland. Cost, timing challenges, and uncertainty about returns keep many farmers from trying them.
Contouring and Terracing
On sloped land, water naturally picks up speed as it flows downhill, carrying topsoil with it. Contour farming counters this by running rows across the slope rather than up and down it. Each row acts like a small speed bump, slowing runoff, giving water more time to soak in, and trapping sediment behind the ridges.
Terracing takes the same principle further. Farmers reshape the hillside into a series of flat steps separated by ridges or channels, effectively shortening the distance water can travel before being interrupted. Where a terrace crosses a natural drainage path, it acts as a small dam, ponding water temporarily. That water can then be released slowly through underground tile drainage systems. The combination of shorter slope lengths and controlled water release makes terracing one of the most effective practices for steep agricultural land.
Windbreaks and Buffer Strips
Trees and shrubs planted along field edges serve double duty. Windbreaks, typically rows of trees on the windward side of a field, slow wind speed before it reaches bare soil. This is especially important in flat, open landscapes where dry topsoil can blow away during spring planting season.
Riparian buffer strips are a related practice used along streams and waterways. These are bands of trees, shrubs, or dense grasses planted between cropland and water. They filter nutrients, pesticides, and animal waste out of runoff before it reaches streams. They also stabilize eroding banks, reduce flood damage to nearby cropland, and create habitat for wildlife. For farmers with land that floods frequently or produces poor yields near waterways, converting those marginal strips into buffers trades minimal productivity loss for significant environmental protection.
Crop Rotation and Diversification
Planting the same crop in the same field year after year depletes specific nutrients, encourages pest buildup, and weakens the community of microbes that keep soil functioning. Rotating between different crop families breaks disease and pest cycles, since organisms that thrive on corn roots, for example, struggle when soybeans follow. Different crops also have different root structures and nutrient needs, which helps maintain a more balanced soil ecosystem over time.
Some farmers take diversification a step further by integrating livestock. Grazing animals on crop residue or cover crops returns nutrients to the soil through manure, and their hooves press plant material into the ground where it breaks down faster. This combination of animals and crops mimics the natural cycle of grasslands, where grazing and regrowth continuously built deep, fertile soils over thousands of years.
Carbon Storage as a Side Benefit
Every conservation practice that adds organic matter to soil also pulls carbon dioxide out of the atmosphere and locks it underground. The rates vary by practice. On cropland, combining cover crops with no-till stores roughly 1.0 metric ton of carbon per hectare per year. Cover cropping alone stores about 0.58 tons, while no-till alone stores about 0.48 tons. Agroforestry, which integrates trees into farming systems, stores around 1.22 tons per hectare annually.
On farms with woody perennial crops like vineyards, the numbers are generally higher, averaging about 1.10 tons of carbon per hectare across practices compared to 0.76 tons on arable cropland. Integrating animals into perennial systems showed the highest rates of all, averaging 2.05 tons per hectare per year. These numbers matter because they represent a measurable climate benefit layered on top of the practical soil health gains farmers are already pursuing.
Precision Technology and Lighter Equipment
Newer tools help farmers apply fertilizers and pesticides only where they’re needed. Soil sensors and remote-sensing technology can estimate nutrient levels across a field, letting equipment adjust application rates in real time rather than blanketing the whole area with a uniform dose. This reduces excess fertilizer that would otherwise degrade soil biology or wash into waterways. Some systems also account for weather conditions, pausing applications during heat, rain, or high wind to minimize waste and off-site contamination.
The equipment itself is changing too. Conventional farm machinery is large and heavy, compacting soil in ways that reduce its ability to absorb water and support root growth. Smaller autonomous machines and robots are beginning to replace some of that heavy equipment. Lighter machines compact soil less, and because they can navigate tighter spaces, they make it feasible to farm smaller, more diverse plots rather than the vast monoculture fields that heavy tractors demand. That shift toward smaller, more varied fields naturally supports many of the other conservation practices on this list.