The environmental factors that affect soil microbial activity include: ______ , water, soil pH, oxygen, biological factors, and soil management measures.
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Soil enzymes are divided into four categories according to their functions, which including oxidoreductase, hydrolase, transferase and ______ .
Actinomycetes generally grow in slightly alkaline environments and their optimal pH is between 7.5-8.0.
The activity of soil enzymes were affected by soil texture, soil structure, soil moisture, pH and temperature.
The important groups of soil microorganisms are bacteria, actinomycetes, fungi and algae.