This article was originally published on Phys.org
“As devastating images of the 2019 Midwest floods fade from view, an insidious and longer-term problem is emerging across its vast plains: The loss of topsoil that much of the nation’s food supply relies on.
Today, Midwest farmers are facing millions of bushels of damaged crops such as soybean and corn. This spring’s heavy rains have already caused record flooding, which could continue into May and June, and some government officials have said it could take farmers years to recover.
Long after the rains stop, floodwaters continue to impact soil‘s physical, chemical and biological properties that all plants rely on for proper growth. Just as very wet soils would prevent a homeowner from tending his or her garden, large amounts of rainfall prevent farmers from entering a wet field with machinery. Flooding can also drain nutrients out of the soil that are necessary for plant growth as well as reduce oxygen needed for plant roots to breathe, and gather water and nutrients.
As scientists who have a combined 80 years of experience studying soil processes, we see clearly that many long-term problems farmers face from floodwaters are steeped in the soil. This leads us to conclude that farmers may need to take far more active measures to manage soil health in the future as weather changes occur more drastically due to climate change and other factors…”
Read on at: Phys.org