1. Choose suitable organic fertilizer for different crops. Different crops have unique nutrient requirements, so they should be treated differently. For example, commercial organic fertilizer is suitable for leguminous crops, melons, fruits, and vegetables, while farmyard organic fertilizer can be selected for field crops based on soil conditions and crop types.

2. Master the timing of fertilization. Generally speaking, the crop growth period is a good time for fertilization, but the specific fertilization time should also be determined based on the crop growth status and soil conditions. For instance, leafy vegetables can be fertilized in the early and middle stages of growth, while fruit and vegetable crops are more suitable for fertilization in the middle and late stages of growth. In addition, avoid fertilizing on rainy days or in high-temperature weather to prevent adverse effects on fertilizer efficiency.

3. The main application methods of organic fertilizer include base fertilizer application and topdressing. Base fertilizer is applied before crop planting, usually by broadcasting or row application. Broadcasting is suitable for large-area farmland, while row application is applicable to small-area farmland for crops such as vegetables and fruits. Topdressing is applied during the crop growth period, typically by hole application or furrow application, which is conducive to nutrient absorption by crops.

4. Use an appropriate amount of organic fertilizer. The dosage of organic fertilizer should be determined according to the crop growth status and soil conditions. Generally, 1,000 to 2,000 kilograms of organic fertilizer are needed per mu (a Chinese unit of area, approximately 0.067 hectares) of farmland, and the specific dosage should be adjusted based on actual conditions. At the same time, attention should be paid to the quality and source of organic fertilizer to avoid using inferior or contaminated organic fertilizer.