What are the ten key principles of soil biological fertility?
The biological components of soil perform a number of important processes, soil biological fertility : • Soil organisms are most abundant in the surface layers of soil, • Soil organic matter is naccessary for nutrient cycling and soil aggregation, • Maximum soil biological diversity depends on the diversity of organic matter and habitats, • Nitrogen fixing bacteria form specific associations with legumes under specific conditions , • Nitrogen is released during organic matter breakdow, either into soil or into the soil micobial biomass, • Arbuscular mycorrhizal fungi can increase phosphate uptake into plants in P-deficient soils, • Soil amandments can alter the physical and chemical environment of soil organisms, • Some crop rotations and tillage practices decrease the suitability of soil for plant pathogens, • Production systems based on soil biological fertlity can be profitable, • Soil biological processes develop slowly, and the time required will differ for different soils, enviro
