Conservation

Healthy soils are a precious resource. They are vital for protecting ecosystems, maintaining water quality, producing crops, and mitigating climate change.

The water cycle is a delicate balance. In natural settings, water from rainfall or snowmelt can soak into soil or runoff to streams. Some of the water is stored in natural underground reservoirs – called groundwater. Plants use up the water to grow, and then new precipitation refills the groundwater – a process called groundwater recharge.

Today’s cities don’t have walls for protection like ancient ones, but they are separate from less urban and rural land. Most goods that city-dwellers purchase are brought in from rural farms and manufacturers. There is an active community of urban gardeners and landscape architects who are trying to bring more of the “country” back into the city. And for good reason.

You may have heard the term “carbon sequestration.” In its basic terms, it refers to keeping and returning carbon to the soil. Since carbon is an element, how and why should this be done?

Traditional crops are not a good match for all farmland, such as parts of the North Carolina Piedmont region.

Here, farmers need more options because some of the soils are poor, have been eroded, and often experience drought. Bioenergy crops may be a good option on these lands.

The United States grows a lot of corn and soybeans. Some researchers think it’s a good idea to add wheat into that mix.

By late fall, much of the Midwest is a pleasing landscape of dry, harvested corn fields. It makes for a bucolic rural scene on highway drives. But the corn litter that’s left over doesn’t seem useful, at least to untrained eyes.

Seeing trees living alongside other vegetation is normal in nature but not something often seen in farming. However, some researchers see benefits in planting crops in between rows of trees in a practice called “alley cropping.”

The more mature, stable trees can have many benefits for the landscape. They can help fight climate change and the effects of extreme weather, as well as provide protection against processes like erosion.

Farmers can use a variety of practices to keep their soils healthy. Some of these practices include not tilling the land, planting cover crops between growing seasons and rotating the type of crop grown on each field.

Farmers often need to regulate soil temperature, reduce weeds, and minimize water loss. Agricultural mulch can help farmers do so.

But the plastic in commonly used agricultural mulch can degrade soil and water quality. Microplastics can even enter the food chain.