If the organic fertilizers lack these indicators or these indicators are less than the standard, they are not considered to be the genuine organic fertilizers.
The first indicator, pH indicates the acidity-alkalinity of the organic fertilizers and soils.
When the pH of the soils is below 6, the soils are acidic and affect badly to the plants.
If the pH of the soils is between 4-5 or below 4, the soils are stronger acidic. Then the plant diseases such as root rot from Phytophthora sp. can occur to the plants.
The good organic fertilizers should have the neutral pH, that is 7.