• Aquifers and soil filter effect : nitrogen in the environment (WQ, 2017) 

    Broz, Bob (University of Missouri, Office of Extension, 2017)
    Groundwater is like a very large, saturated underground sponge made of sands and gravels. Water seeps through this sponge at varying rates, depending on the permeability of the sands or gravel. Water filters down through ...