In Iowa they call it “black gold” – a fertile blanket covering ... mulch with sand and silt to form a nutrient-rich type of soil called loam. It gave Iowa one of the most fertile soils ...

Nagpur: It is said that there are more living organisms in a tablespoon of soil than there are people on Earth. A group of women farmers from Bhulgad in Yavatmal don't know this, but it doesn't ...