1、Controlled

Controlled release fertiliser (CRF) plays an important role in sustainable agriculture. Its implementation is considered as a transformative approach, promoting environmentally conscious methods for enhancing crop productivity.

2、Controlled Release Fertilizers: A Review on Coating Materials and

With existing challenges on low nutrient use efficiency (NUE) of urea and its environmental concerns, controlled release fertilizers (CRFs) have become a potential solution by formulating them to synchronize nutrient release according to the requirement of plants.

3、Controlled

Currently, a new type of fertilizers, controlled-release fertilizers, is becoming increasingly popular. These are slowly soluble fertilizers, in which the release of the nutritional components to the environment is executed gradually, generally through pores (of a capsule or matrix).

4、(PDF) Controlled release fertilizers (CRFs) for climate

The application of CRFs can reduce the loss of nutrients, provide higher nutrient use efficiency, and improve soil health simultaneously to achieve the goals of climate-smart agricultural...

Bio

Therefore, to reduce environmental threats while preserving substantial agricultural yields of good quality, controlled-release fertilizers (CRFs) have been developed recently with various coating materials and techniques.

Cellulose

This review places particular emphasis on the importance of surface functionalization in enhancing the properties of cellulose for use in controlled-release fertilizers (CRFs).

Controlled

The soil temperature and the thickness and type of the coating are the main determining factors for the speed of the release: The higher the soil temperature and the thinner the coating, the faster the release.

Controlled‐release nitrogen fertilizers: A review on bio‐based and

Controlled-release fertilizers (CRFs) present a promising solution by mitigating nutrient loss and enhancing plant uptake. However, concerns arise with synthetic polymer-coated fertilizers, as they may not degrade in soil and can impact microbial activity.

Controlled release fertilizers (CRFs) for climate

The application of CRFs can reduce the loss of nutrients, provide higher nutrient use efficiency, and improve soil health simultaneously to achieve the goals of climate-smart agricultural (CSA) practices.

Controlled Release Fertilizers: A Review on Coating Materials and

With existing challenges on low nutrient use efficiency (NUE) of urea and its environmental concerns, controlled release fertilizers (CRFs) have become a potential solution by formulating them to synchronize nutrient release according to the requirement of plants.

Controlled-release fertilizers (CRF) are a specialized type of fertilizer designed to release nutrients slowly and continuously into the soil after application. This reduces the frequency and dosage of fertilization while improving nutrient use efficiency. While CRF can enhance soil fertility and crop growth, whether they are suitable for surface application and their effectiveness depend on specific conditions.

Working Principle of Controlled-Release Fertilizers

CRF typically consists of fertilizer particles or powders coated with slow-release materials, such as polymers, natural substances like clay, or bio-agents. When exposed to soil, these coatings gradually dissolve, allowing nutrients to be released slowly over time.

Application Methods of Controlled-Release Fertilizers

CRF can be applied in several ways, including:

1. Basal Application: Sprinkling CRF onto the soil surface and then incorporating it into deeper soil layers. This method is suitable for crops with deep root systems requiring high soil fertility.
2. Hole Application: Placing CRF into planting holes before covering with soil. This is ideal for shallow-rooted crops with lower fertility demands.
3. Foliar Spraying: Applying CRF directly onto crop leaves via spraying. This method is used for supplemental feeding or micronutrient addition.

Effects of Controlled-Release Fertilizers

The benefits of CRF include:

1. Fertilizer Savings: Slow nutrient release reduces the need for frequent applications and lowers agricultural costs.
2. Improved Fertility Efficiency: Nutrient absorption by crops becomes more consistent and efficient due to prolonged release.
3. Soil Structure Enhancement: CRF improves soil physical and chemical properties, boosting water and nutrient retention.
4. Environmental Protection: Reduces soil and water pollution caused by excessive fertilization.

Conditions for CRF Use

Despite its advantages, CRF is not universally suitable. Key considerations include:

1. Crop Requirements: Different crops have varying nutrient needs. CRF use should align with specific crop demands.
2. Soil Conditions: Soil fertility, pH, and organic matter content significantly impact CRF effectiveness.
3. Climate: Local weather patterns affect crop growth and nutrient needs, requiring adjusted CRF application strategies.

CRF is a highly efficient and environmentally friendly fertilizer that boosts agricultural productivity while minimizing environmental harm. its success depends on tailored application based on crop needs, soil properties, and climate. Proper use of CRF can drive sustainable agricultural development.