Pasture Health, Soil Soil Health – We All Love It, But What Is It Worth? Rachel Gilker July 17, 2017 If your field or pasture has been plowed, sometimes the topsoil is called the plow layer. Soil scientists call topsoil the A horizon whenAll the grazing management tips you need Subscribe to read this article and over 2,500 more! Subscribe today! If you're already a subscriber, log in here.