Circle the one solution that answers each question or completes each sentence. The principle, which states that the level of plant production can be no greater than that allowed by the most limiting of the essential plant growth factors, is called the nutrient-carrier hypothesis. A soil is polluted with petroleum products and lacks adequate petroleum-degrading microbial species. Bacillus thurginsienis 4.
Organic compounds vary greatly in their rate of decomposition.
All of the above. Both a and b. 5. All of the above Both band c 6. Clover Bacteria Humus Wheat straw 8. A fertile, desert soil that's been growing irrigated crops for 10 years will have biomass and humus than the adjacent, nonirrigated field under native vegetation.