Sludge deposited from urban sewage: Although it contains a certain amount of organic matter and NPK components, such raw materials do not cost money, and the processing cost is very low, but heavy metals and E. coli are seriously exceeded, which easily leads to dead roots and dead trees. It is easy to cause malignant cancer after eating.
Sludge deposited from industrial wastewater: Although this type of sludge also contains a large amount of elements and organic matter, heavy metals are also seriously exceeding the standard, which can cause rotten roots, dead trees, and serious pollution of the soil.
Paper mill waste: This fertilizer, the main ingredient is lignin. It is an organic matter that is extremely difficult to absorb. Moreover, many chemical raw materials are added in the process of papermaking, and most of these raw materials remain in the waste. It has great damage to the soil and has a great influence on the roots.
Weathered coal: It belongs to the apparent organic matter and cannot be the carbon source of soil microbes. The real active ingredient in weathered coal is humic acid, but not deep processing is an ineffective organic nutrient.
MSG factory waste: strong acidity. Although it is a food waste, it is not necessarily a good raw material for organic fertilizer.
The soil needs organic fertilizer, but it doesn't need cheap organic fertilizer. It doesn't need fake organic fertilizer. Then you have to polish your eyes! (Yantai North Fruit and Vegetable Farming and Market Pesticide Assistant)
This article URL: buy organic fertilizer, pay attention to the raw materials of which raw materials, the effect of organic fertilizer is not good
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