assign6 summer

4. a process in the N & P cycles which converts organic nutrients to inorganic, plant available forms
10. a gaseous N loss from the soil, which occurs under low oxygen conditions
11. sometimes called decomposers; use organic compounds as a source of energy and carbon
12. plays an important role in the decomposition of woody structures
13. autotrophic, Eukaryote organism abundant in wet soils
14. a deficiency in this type of nutrient makes it impossible for the plant to complete its life cycle

1. ammonia may be lost from alkaline soil through this process
2. primary producers, obtain carbon from CO2 and energy from photosynthesis
3. ionic form of phosphorus
5. effective burrowers that mix and aerate upper soil horizons
6. a genus of nitrogen-fixing actinobacteria that live in symbiosis with alder trees
7. the narrow region around roots
8. Nitrogen fixing bacteria commonly associated with legumes
9. an organic horizon under well-drained conditions which contains relatively fresh (identifiable) organic residues