What is soil made of?

Soils can look like they are a homogeneous material. But in reality, soil contains solid particles of different sizes and different types. Some of the particles are minerals, and others are organic matter. There are spaces between the particles called pores. These pores may be filled with air or water. Soil is a mixture of … Continue reading What is soil made of?

What is “soil carbon”?

You may have heard a lot about soil carbon, “storing” carbon in soil, or “carbon markets.” So, let’s look at the relationship between soil and carbon in basic terms. First, carbon. It’s the sixth element on the periodic chart. In nature, only two things are pure carbon: diamonds and graphite. However, carbon can interact with … Continue reading What is “soil carbon”?

How do wild pigs affect riparian systems?

If you live in the southeastern United States, there’s a good chance you’ve encountered wild pigs or their damage. They can live along stream beds and dig in fields or along roadsides. In the U.S., wild pigs are an invasive species and don’t have many predators. They can affect water quality, compete with native species … Continue reading How do wild pigs affect riparian systems?

How do soils and humans impact one another?

Soils are a finite resource, and only renew over centuries or millennia. Soils provide many “services” to humans, yet it is largely an ignored resource. Some of the services soils provide are: Capturing and cleaning rain and snowfall,Providing structure to grow our food,Holding carbon in the form of organic matter (carbon sequestration), andProviding a home … Continue reading How do soils and humans impact one another?

Are there soil microbes under my fingernails?

If you’ve been gardening without gloves lately, then the answer is probably “yes.” But that is, for the most part, a good thing – besides having to clean your hands! In garden soil there are millions to billions of microorganisms, or microbes. They could be bacteria, fungi, viruses, and archaea. Baseline estimates suggest that there … Continue reading Are there soil microbes under my fingernails?

How is erosion affecting the recovery of the Fukushima area?

On March 11, 2011, Japan experienced the unprecedented Tohoku earthquake. It was the largest in Japan’s history, and created a massive tsunami that impacted Japan’s northeastern coast. A result of the earthquake and tsunami was the meltdown of the Fukushima Daiichi Nuclear Power Plant. This meltdown had immediate and long-term impacts on the area. On … Continue reading How is erosion affecting the recovery of the Fukushima area?

How is San Antonio reducing its solid waste?

Last year, a group of agronomists and soil scientists toured several locations in San Antonio that highlight some new programs and services. Composting can help reduce waste and solve landfill problems. Urban agriculture can reduce the amounts of food deserts and make good use of open urban land. Let’s look at what San Antonio is … Continue reading How is San Antonio reducing its solid waste?

Is lead contamination ancient history?

Lead's use may be – but we still have a lead problem, especially in urban areas. The first extraction of the metal lead from ores was ancient – around 7,000 BCE. In the millennia since, Egyptians have used it in cosmetics, Romans in their pipes, the British in their ammunition, and now every society in … Continue reading Is lead contamination ancient history?

What’s being done to restore wetlands?

Wetlands are fun places to get muddy, enjoy the outdoors, and listen for birdsongs. They provide important habitat for wildlife, and for recreation. You’ve likely seen wetlands on the fringes of lakes, on river floodplains, along the coast, and anywhere else where water accumulates on the landscape. Wetlands are found at the intersection of earth/soil … Continue reading What’s being done to restore wetlands?

Determining the impact of Deepwater Horizon’s spill on soil

Immediately after the Deepwater Horizon oil spill some immediate questions posed were: how bad is the spill in terms of coastal pollution; and,what new technologies could be brought to bear for environmental quality assessment? To evaluate these questions engineers and spill responders were brought in. Their job was to evaluate new and innovative technologies that … Continue reading Determining the impact of Deepwater Horizon’s spill on soil