Phosphate and nitrogen-containing ions are crucial for healthy plant growth and soil quality.
Explain why phosphate ions are essential for healthy plant growth.
Name the biological process by which saprobiontic microorganisms decompose organic nitrogen-containing compounds in dead organic matter to release ammonium ions into the soil.
In well-aerated soils, ammonium ions are converted into a form that plants can readily absorb through their roots.
Describe how ammonium ions are converted into nitrates, including the specific type of bacteria involved.
The graph shows the effect of different temperatures on the rate of protease activity of a soil-dwelling fungus.
Explain the change in the rate of protease activity from 10∘C10^\circ\text{C}10∘C to 35∘C35^\circ\text{C}35∘C.
Explain the change in the rate of protease activity from 35∘C35^\circ\text{C}35∘C to 55∘C55^\circ\text{C}55∘C.