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Firstly, its proper use can **improve fertilizer efficiency, save fertilizer, and reduce costs. Secondly, it is possible to apply fertilizer only once for annual crops, which saves labor; moreover, the good shape and strength of the fertilizer particles facilitate mechanical handling. Thirdly, as the efficiency of fertilizer use increases, less fertilizer is lost in the soil, which reduces pollution of the atmosphere and water sources caused by fertilizer volatilization and runoff, thus contributing to environmental protection. Fourth, urea absorbs moisture when stored mixed with phosphate fertilizers; coating urea with plastic eliminates this drawback, which is beneficial for the storage of compound fertilizers. Since controlled-release fertilizers are more expensive than conventional quick-acting fertilizers, they can only demonstrate a difference in efficacy compared to those quick-acting fertilizers when used on suitable crops in appropriate regions, thereby leveraging their advantages and achieving the desired economic, environmental, and social benefits. To this end, the following recommendations are given regarding fertilization: First, controlled-release fertilizers are preferably used in humid and hot regions or during the growing season, for crops that require fertilizer for a prolonged period. It is best suited for areas where there is severe loss of fertilizer and water. In areas with high rainfall, quick-acting fertilizers tend to be washed away by water. In hot regions, the nutrients in fertilizers break down rapidly and do not remain in the soil for long; therefore, the use of controlled-release fertilizers yields better results in such areas. Secondly, when used in soils and crops under different conditions, fertilizers with different release times and formulations should be selected. Since controlled-release fertilizers release nutrients more slowly in the early stages, applying them alone during the crop’s seedling stage may lead to nutrient deficiencies. Therefore, when using controlled-release fertilizers, it is generally necessary to combine them with quick-acting fertilizers. The ratio of quick-acting to controlled-release fertilizers should be adjusted according to different soil textures and temperatures. For example, in sandy soils with higher temperatures, a larger proportion of controlled-release fertilizers should be used, while in clayey soils with lower temperatures, a smaller proportion should be used. Fertilization of rice. Since nutrient absorption is concentrated in the early stages of growth, fertilizers with a short release period should be used. For corn fertilization, since a large amount of nutrients are also required in the later stages of growth, fertilizers with a longer release period should be used. Third, based on the characteristics of the fertilizer, different cultivation and fertilization methods should be employed to improve fertilizer utilization efficiency. (In activities such as rice seedling cultivation, for example) to avoid fertilizer-induced damage to seedlings, traditional methods keep a certain distance between the fertilizer and the seeds when applying it; this approach reduces the efficiency of fertilizer use. Since controlled-release fertilizers release nutrients slowly, they help prevent damage to seedlings. It is possible to apply the fertilizer in direct contact with the seeds, thereby improving fertilizer efficiency.