1. Processes that break down rock

3.  Rock is broken apart but not changed chemically

5.  Minerals in rock dissolve or change to other minerals  “Change!”  Natural acids  Oxygen

6.  A mixture of rock  Mineral fragments  Decayed organic matter  Water  Air

7.  Organic matter is slowly changed to humus

8.  VERY important for plant growth

9.  The layers are called horizons  Most soils have an A, B, & C horizons

10.  We have many different types of soil  They have different textures  They have different colors  Because they are different mixtures of clay, silt, and sand

11.  determine the type of soil that forms  Based on weathering  Moisture, etc

12.  A serious problem because topsoil is removed from the land

13.  On steep slopes  Areas not covered by vegetation

14.  Plant shelter belts  Use no-till farming  Plant cover crops after harvesting  Contour farming  terracing