The nutritional composition and characteristics of different organic fertilizers vary greatly, and the following precautions must be taken when using organic fertilizers.

1. Organic fertilizers, except for crop straw that is directly returned to the field, generally require composting to completely decompose it before being applied to the soil, especially high calorie organic fertilizers such as cake fertilizers and chicken manure, and burning seedlings.

2. Human manure is a quick acting organic fertilizer with high nitrogen content, suitable for fertilization. According to the purpose of the crop, harmless treatment should be carried out before use. If used too much in chlorine tolerant crops, the quality will decrease. Long term disposable human manure soil must be equipped with a certain amount of manure, compost, compost, and other organic fertilizers to ensure a balanced supply of soil nutrients.

3. Compost, compost, and biogas residue fertilizer contain a large amount of humus and are suitable for soil fertilization. However, due to the large amount of organic matter that has not yet fully decomposed and decomposed, these fertilizers should be used as base fertilizers rather than fertilizers.

When using straw or mountain grass as fertilizer, it is important to use them in advance; Secondly, disconnect from use; Thirdly, use a certain amount of fresh green manure or decomposed human manure to reduce the carbon nitrogen ratio, meet the nitrogen needs of microbial reproduction, and preliminarily supplement phosphorus fertilizer; Fourth, mix thoroughly with the soil and maintain sufficient water supply; Fifth, the total amount of straw or mountain grass should not be too much to prevent excessive damage to crop roots during the decomposition process of organic matter; Sixth, in areas with severe pests and diseases or pollution, crop straw or mountain grass cannot be directly returned to the field (after fermentation, stacked and returned to the field) to avoid the spread of pests and diseases or land pollution.

Grass ash contains 5% to 10% potassium oxide, which is alkaline and cannot be mixed or stored with decomposed human manure or manure to prevent weight loss.

6. Peat, also known as peat or peat, contains organic matter and humus, but has a high acid value, high content of active iron and active aluminum, low degree of decomposition, and is generally not directly used as fertilizer. It is commonly used as base fertilizer or livestock bedding.

7. Humic acid organic fertilizer has good effects on poor soil, leafy vegetables, tubers, tubers, and grasses, but has poor effects on crops such as rapeseed, cotton wool, and beans.