One of his most popular writings was a set of advice for farmers, which lays out more than 10 different types of earth ... In the United States alone, soil disappears 10 times faster than ...

The most prevalent clay-sized particles in soils fall into the class of layer-type aluminosilicates ... problematic (Hillel 1992), and the United States Dust Bowl of the 1930s where a devastating ...

What you do need, though, is the right type of soil ... thrive in a regular well-draining loamy soil. Dense clay soils can be ...

It gave Iowa one of the most fertile soils on the planet and enabled it to become one of the largest producers of corn, soybeans and oats in the United States over the last 160 or so years.