Answer:all of the above
Explanation:
As organic materials are decomposed by the “living,” they release many of the nutrients needed by plants. Organic chemical compounds produced during the decomposition of fresh residues also help to bind soil particles together and give the soil good structure.
Soil pH is the measure of acidity (sourness) or alkalinity (sweetness) of a soil. ... In some mineral soils aluminum can be dissolved at pH levels below 5.0 becoming toxic to plant growth. Soil pH may also affect the availability of plant nutrients. Nutrients are most available to plants in the optimum 5.5 to 7.0 range. A pH level that is too low also liberates aluminum—not a plant nutrient—in amounts that can stunt root growth and interfere with a plant's uptake of nutrients. At a high pH level, the plant nutrient molybdenum becomes available in toxic amounts.
Minerals in soil helps the plant feed off, the necessities for living
