A Review of Slow-release Fertilizers from the Perspective of the Environment and Economy, and its Future in Iran and the World

Slow-release fertilizers prevent the rapid release of nutrients by creating a barrier. These fertilizers are produced in two ways: coated and matrix. Slow-release fertilizers can reduce nutrient loss and cause more use of plant needs. This will increase the efficiency and effectiveness of fertilizer. The process of producing fertilizers, including nitrogen fertilizers, is growing yearly in Iran and the world. This trend can also be predicted to continue in the coming years. Research on slow-release fertilizers shows that their production and consumption are increasing globally. Many sulfur is produced in refineries in Iran due to significant oil and gas sources. As a result, slow-release fertilizers can be made cheaper in Iran by creating sulfur coating compared to other countries. This article aims to examine the use of slow-release fertilizers, their advantages and disadvantages, and to present their production method. Also, this study investigates the rate of production of slow-release fertilizers in the world. This article can provide helpful information to investors, producers, farmers, and consumers interested in slow-release fertilizers and their role in agriculture.