The soil that's darkest in color is widely known as topsoil. Soil scientists call this layer the "A-horizon." It's the "black, organic, rich soil that's really good for growing crops," says Evan ...

Color Analysis Rapidly Predicts Carbon Content Of Soil Date: March 13, 2007 Source: American Society of Agronomy Summary: Soil color can be used as a simple, inexpensive method to predict ...

Soil cores were split in half and matched to a color chip in a Munsell Soil Color Book. The matrix color of soil layers were described according to Munsell Soil Book .