Cow and sheep dung not only contains rich nutrients, but also contains some harmful substances. Untreated cow dung contains substances such as hippuric acid, which is harmful to the root system of plants. Fertilizers that have not been fermented and decomposed are put into agriculture, which is harmful to crops. So what are the basic indicators of organic fertilizer fermentation and decomposition? Tongda Heavy Industry summarizes the following points, hoping to help everyone.

1. Looseness The biological fermentation method starts to loosen and appear in a crumbly state from the fourth day of fermentation.

2. Odor The odor of the biological fermentation method is reduced from the second day, basically disappears on the fourth day, completely disappears on the fifth day, and emits the fragrance of soil on the seventh day.

3. Temperature The biological fermentation method reaches the G temperature stage on the second day and begins to fall on the 7th day. Maintaining the G temperature stage for a long time, the fermentation and decomposition are thorough.

4. PH value The PH value of the biological fermentation method reaches 6.5.

5. Moisture content: The initial moisture content of the fermentation raw materials is 55%, and the moisture content can be reduced to 30% by biological fermentation method.