This article throws light upon the five categories of organisms found in soil. The categories are: 1. Animalia 2. Protista 3. Plantae 4. Fungi 5. Monera. Soil Microorganism: Category # 1. Animalia: The large animal life-Animalia (Previously macro-faunae)-that inhabit the soil range in size from large burrowing animals, such as badgers to tiny arachnids mites. a. Burrowing Animals: Large animals [...]
After reading this article you will learn about the symbiotic and non-symbiotic nitrogen fixing bacteria. Symbiotic N2-Fixing Bacteria: The heterotrophic bacteria that fix di-nitrogen gas (N2) from the atmosphere in plant root nodules (symbiotic bacteria) have a mutually beneficial relationship with their host plants. Legumes (pod-bearing plants such as peas, beans, alfalfa and clovers etc.) had a beneficial effect upon [...]
This article throws light upon the seven major conditions affecting activities of micro-organisms present in soil. The conditions are: 1. Moisture 2. Soil Reaction 3. Temperature 4. Nutrients 5. Organic Matter 6. Microbial Products 7. Microbial Enemy. Condition # 1. Moisture: Dryness kills many microbes and many micro-organisms develop resistant strains or enter a dormant stage. Micro-organisms are less active [...]