(a) Soil in central Iowa with dark, organic-matter-rich topsoil. Iowa's average topsoil depth decreased from 35-45 cm to 15-20 cm during the 20th century due to farming. (b) Severe gully erosion ...

When European-American settlers first began ploughing in Iowa, they found the weather and local geology had combined this organic mulch with sand and silt to form a nutrient-rich type of soil ...

As of late January, soil temperatures show a frost depth of around 17" in Eastern Iowa, and 4-inch soil temperatures well below freezing. Whether this has a negative impact depends on future ...

Beginning in the 2017 growing season, The Iowa Nutrient Research & Education ... in growers applying the nutrient only when the soil is at or below optimum levels for it – increasing from ...

who initiated and led the study during his previous position at Iowa State. Even without sequestering more carbon, diversified cropping systems can have a positive climate impact. Soil organic matter ...

A new study from Iowa State University researchers found that diversifying crop rotations does not aid in carbon ...

Longer more diverse rotations of crops fertilized with livestock manure have many environmental benefits, but carbon ...