In recent years, the Ministry of Agriculture has vigorously promoted the use of organic fertilizer, which has set off a spring breeze for the development of organic fertilizer. In the face of the organic fertilizer market, some unscrupulous manufacturers have used inferior materials to make organic fertilizers in order to make high profits, making gimmicks on packaging, and fooling farmers. Inferior and deceptive organic fertilizers generally use the following five things as raw materials, which not only do not have good results, but also have the opposite effect. Choose carefully and choose trustworthy and good-quality organic fertilizers.

Although the sludge precipitated by urban sewage contains a certain amount of organic matter and nitrogen, phosphorus and potassium components, this kind of raw materials does not cost money and the processing cost is very low, but the heavy metals and E. coli seriously exceed the standard, which is easy to cause dead roots and dead trees, and the fruit is eaten by people. It is easy to cause malignant cancer.

Although the sludge precipitated by industrial wastewater contains a large number of elements and organic matter, heavy metals are also seriously exceeding the standard, which can cause rotten roots and dead trees, and seriously pollute the soil.

The waste of paper mills, this fertilizer, is mainly composed of lignin, which is an organic matter that is extremely difficult to absorb. What's more, many chemical raw materials are added in the papermaking process, and most of these raw materials are stored in the waste. The damage to the soil is great, and the impact on the roots of the trees is great.

The investigation of weathered coal found that weathered coal is only apparent organic matter and cannot be a carbon source for soil microorganisms. Although weathered coal contains humic acid and fulvic acid, these nutrients cannot play their role without further processing.

The waste from the MSG factory is strongly acidic. Although it is food waste, it is not necessarily a good raw material for organic fertilizer.

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