HORT: Organic Gardening Final, Hort
3300 Final Exam Q&A 100% Pass
Define and describe the similarities and differences between the 'Law of
the Minimum" and "Law of Return." Include the originators of these theories
and explain where they fit into current gardening practices. Is one mutually
ex...
actual do to effect OM, not just that they decrease or increase....i.e. provide
a scientific explanation) - ✔✔• Typical percentage of OM in the soil is
between 3% and 5% (this is what you aim for)
• Components
i. Dead Plants
ii. Animal and microbial waste products
iii. Humus
1. Humus is the result of dead plants and animal waste broken down into
matter that is amorphous
2. Term coined in the late 1700s
3. Influences bulk density, contributes to moisture and nutrient retention
4. Humus is the component that does not break down further
b. Increase
. Add compost
1. The materials going through decomposition will release OM)
i. Grow cover crops and then till into soil
1. The plant material tilled into the soil will break down into OM)
c. Decrease
. Erosion
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