Granular Manganese Oxide (MnO) for Soil Nutrient Supplement
Short Product Description
Granular manganese oxide (MnO) is a manganese micronutrient source used in agricultural fertilizer formulations. This product supplies stable manganese content for correcting manganese deficiency in soils and supporting plant metabolic functions. Granular MnO provides controlled nutrient release and easy handling in fertilizer blending systems.

Technical Specifications
| Parameter | Typical Value |
|---|---|
| MnO Purity | ≥ 90–95% |
| Manganese (Mn) Content | ≥ 60% |
| Particle Size | 1–3 mm granules |
| Moisture | ≤ 1.5% |
| Bulk Density | 1.0–1.5 g/cm³ |
| Solubility in 2% Citric Acid | ≥ 85–90% |
| Arsenic (As) | ≤ 5 ppm |
| Lead (Pb) | ≤ 10 ppm |
| Cadmium (Cd) | ≤ 5 ppm |
Heavy metal limits are critical compliance parameters for agricultural fertilizer safety and environmental regulations.
Key Features
High manganese concentration provides an efficient micronutrient source for soil fertility management
Granular Manganese Oxide (MnO) ensures stable manganese supply in fertilizer blends
High solubility in weak organic acids improves manganese availability to plant roots
Controlled granule size improves compatibility with fertilizer blending systems
Low heavy metal contamination supports compliance with agricultural safety standards
Good flowability and reduced dust during fertilizer manufacturing and application
Applications
Compound fertilizer production – granular MnO is incorporated into NPK fertilizers to provide manganese micronutrient supplementation.
Soil micronutrient correction – applied to manganese-deficient soils to support enzyme activation and chlorophyll formation in crops.
Agricultural micronutrient blends – used in multi-element fertilizers containing zinc, iron, and boron.
Crop nutrition programs – suitable for cereals, vegetables, fruit trees, and plantation crops requiring manganese for photosynthesis and metabolic functions.
Granular Manganese Oxide (MnO) for Soil Nutrient Supplement – used as a stable manganese source in agricultural fertilizer formulations.
Problems This Product Solves
Manganese deficiency in agricultural soils → provides a reliable manganese source required for plant enzyme systems and chlorophyll synthesis.
Uneven micronutrient distribution in fertilizer blends → controlled granule size improves uniform mixing during fertilizer manufacturing.
Dust generation during fertilizer handling → granular structure reduces powder dust compared with fine manganese oxide powders.
Inconsistent micronutrient supply in soil → stable MnO composition ensures predictable nutrient availability.
Environmental contamination risks → controlled heavy metal levels help meet fertilizer safety standards.
Packaging & Supply
Standard packaging: 25 kg kraft paper bags with inner PE liner
Palletized export packaging for container shipments
Bulk supply available for fertilizer manufacturers and agricultural distributors
Samples available for fertilizer formulation and soil testing programs
Customization & Technical Support
We can provide:
Customized particle size and granule diameter for fertilizer blending
Adjusted manganese concentration based on fertilizer formulation requirements
Bulk supply for fertilizer plants and agricultural distributors
Technical consultation for soil micronutrient fertilizer formulation
FAQ
1. What crops benefit most from manganese oxide soil supplementation?
Crops such as cereals, soybeans, vegetables, and fruit trees require manganese for enzyme activation and photosynthesis. MnO supplementation helps correct manganese deficiency in soils where manganese availability is limited.
2. How does granular MnO compare with manganese sulfate in fertilizers?
Granular manganese oxide provides a slower and more stable manganese release compared with highly soluble manganese sulfate. It is commonly used in compound fertilizers where controlled nutrient release is preferred.
3. Can Granular Manganese Oxide (MnO) for Soil Nutrient Supplement be blended with NPK fertilizers?
Yes. The granule size and physical stability allow MnO to be blended directly with NPK fertilizer granules without significant segregation during storage or transport.
4. What storage conditions are recommended for manganese oxide granules?
Store in a dry, well-ventilated environment and avoid prolonged exposure to moisture. Proper storage helps maintain granule integrity and prevents agglomeration.
5. What is the typical shelf life of granular manganese oxide?
When stored in sealed packaging under dry conditions, manganese oxide granules typically have a shelf life of more than two years without significant degradation.