Topsoil is the top portion of the soil consisting of minerals, organic matter and microorganisms. It can range from a few ...

Topsoil is used to grow 95 percent of our food, and it is disappearing ten times faster than it is being replaced: America’s corn belt has already lost much of its topsoil, threatening ...

But beneath the feet of Iowa’s farmers, a crisis is unfolding. The average topsoil depth in Iowa decreased from around 14-18 inches (35-45cm) at the start of the 20th Century to 6-8 inches (15 ...

Scholars are hailing the discovery of a fossilized mastodon jaw discovered by a man who spotted two giant teeth while ...