APES - Plant Agriculture - Max Clark

2. Partially decomposed plant and animal matter.
5. Essential nutrient in soil for plant growth and protein synthesis.
8. Non-decomposed plant matter & humus.
9. Part of a plan which gathers water, nitrogen, phosphorous & potassium from the soil.
13. Organic matter, weathered rock particles, & topsoil.
15. The process of soil being worn away by wind or water.
18. A process which loosens & mixes soil, increases water percolation and adds O2 to the soil.
19. The physical breakdown of rocks by rain, other rocks, heat, etc.

1. The process of a water moving downward through a porous material like soil or rock under the influence of gravity.
3. Medium sized particles soil type.
4. A model used for classifying soils based on the % makeup of said soil.
6. Unweathered, solid rocks. (Bedrock)
7. Rocks with little weathering.
10. Soil forms by undergoing this process.
11. A soil type with a balanced mix of sand, silt, and clay.
12. Tiny rock particles which come from the topsoil & subsoil.
14. bowl A decade-long period in the 1930s when severe droughts and massive dust storms plagued the Great Plains
16. Largest sized particles soil type.
17. Smallest sized particles soil type.
20. The molecular nature of rock is changed due to reaction with water, oxygen, etc.