13-40-13 Controlled-Release Fertilizer
NPK 13-40-13 Controlled-Release Fertilizer
13-40-13 Controlled-Release Fertilizer
| Product Name: | NPK 13-40-13 Slow-release fertilizer |
| Category: | Controlled-Release Fertilizer – Products |
| Nutrient Composition: | Total N – 13%, P₂O₅ – 40%, K₂O – 13% |
| Coating Technology: | Polymer-coated granules (single or multi-layer) |
| Release Duration: | 30–90 days (based on coating type and temperature) |
| Granule Size: | 2.0–4.0 mm (customizable) |
| Secondary Nutrients: | Sulfur (4–8%), Micronutrients (Fe, Mn, Zn, Cu, B) available on request |
| Payment Terms: | T/T, L/C, cash(USD, EUR, RMB) |
| Certificate: | ISO 22241-1, ISO 9001 standard. |
13% Nitrogen
Total nitrogen 13% (N) of which 4% nitrate nitrogen and 9% ammonium nitrogen (optional)
40% Phosphorus
Total Phosphorus 40% (P) Diammonium phosphate 28%, monoammonium phosphate 10%, calcium superphosphate 2% (optional)
14% Potassium
Total Potassium 13% (K) Potassium Sulfate / Potassium Chloride (optional, prices vary)
Other Elements
Sulfur (5–9%), Micronutrients (Fe, Mn, Zn, Cu, B) available on request ...
13-40-13 Controlled-Release Fertilizer Description
Risso 13-40-13 Controlled-Release Fertilizer is a scientifically engineered NPK formulation containing 13% total nitrogen, 40% phosphorus pentoxide (P₂O₅), and 13% potassium oxide (K₂O). This high-phosphorus ratio is ideal for promoting vigorous root development, enhanced flowering, and improved fruit set in a wide range of crops. The advanced controlled-release technology ensures a gradual and sustained nutrient supply, optimizing crop uptake and minimizing environmental losses.
Key Features & Agronomic Benefits
Balanced Nutrient Delivery: 13-40-13 composition supports critical early-stage development, including rooting, tillering, and flowering.
Controlled-Release Efficiency: Advanced polymer-coated or sulfur-coated granules provide consistent nutrient release aligned with plant growth cycles.
High Water Solubility: Fully soluble in water for drip irrigation (fertigation) and foliar applications, ensuring uniform distribution.
Chloride-Free & Low Salt Index: Minimizes salinity stress and enhances plant safety—ideal for salt-sensitive crops.
Optional Enrichments:
+TE (Trace Elements): Fortified with chelated micronutrients (Fe, Mn, Zn, Cu, Mo, B) to support metabolic and enzymatic functions.
+HA (Humic Acids): Improves soil structure, cation exchange capacity, and nutrient retention.
Technical Specifications
| Parameter | Value |
|---|---|
| Total Nitrogen (N) | 13% (Nitrate-N + Ammonium-N) |
| Phosphorus (P₂O₅) | 40% (100% water-soluble) |
| Potassium (K₂O) | 13% (100% water-soluble) |
| Trace Elements (Optional) | Fe, Mn, Zn, Cu, Mo, B (EDTA/DTPA chelates) |
| Humic Acids (Optional) | ≥ 3% (derived from leonardite) |
| Release Duration | 30–90 days (based on coating type and temperature) |
Recommended Applications
Application Methods:
Soil Application (Granular): Apply at planting or transplanting. Suitable for vegetables, fruits, and field crops.
Fertigation (Drip Systems): Dissolve 1–3 kg per 1,000 L water. Apply weekly or as per crop stage.
Foliar Spray: Use at 4–7 g/L during early growth and flowering for rapid uptake.
Dosage Examples:
Greenhouse tomatoes: 2.5–3.5 kg/ha per fertigation cycle
Citrus/fruit trees: 50–100 g per plant, split doses
Seedling nursery: 0.5–1.0 g per L (foliar spray)
Target Crops & Usage Scenarios
Crop Types: Vegetables (tomato, cucumber, lettuce), fruits (citrus, grape, mango), cereals, ornamental plants, turfgrass.
Growth Stages: Early vegetative phase, transplanting, flowering, and fruiting.
Cultivation Systems: Open-field, greenhouse, hydroponics, drip irrigation.
Controlled-Release Technology
Risso’s controlled-release fertilizers feature a high-efficiency coating system that regulates nutrient availability through:
Moisture Activation – water penetrates the coating.
Gradual Diffusion – nutrients release steadily over time.
Synchronized Nutrition – matches plant demand, reducing leaching and volatilization.
This ensures higher nitrogen use efficiency (NUE) and better yield response in diverse soil and climatic conditions.
Packaging & Customization
Standard Pack Sizes: 9.5kg, 25 kg PE-lined woven bags, 500 kg jumbo bags
Custom Services: OEM/ODM labeling, tailored NPK ratios, coating duration, micronutrient enrichment, and color coding for granules
Certifications: ISO 9001, ISO 14001, REACH compliance; RoHS and heavy metal limits upon request
Shelf Life: 2 years under dry, ambient storage conditions
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Why Choose Risso® 14-14-14 CRF?
Risso® 13‑40‑13 CRF is formulated to jump-start early plant development with a strong phosphorus push. Ideal for transplanting, flowering, and root-intensive stages, it ensures your crops receive the nutrients they need—when they need them most. Backed by agronomic research and global field use, this fertilizer supports higher crop vigor, stronger roots, and sustainable productivity. With precise nutrient delivery and reduced application frequency, Risso® 13‑40‑13 CRF is the smart solution for high-efficiency agriculture.
