Actinomycetes generally grow in slightly alkaline environments and their optimal pH is between 7.5-8.0.
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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.
The finer-textured soils accumulate more organic matter
Humic acid is undissolved in acid solution