Manganese Sulphate Pure (Spray)

🌱 Uses of Manganese Sulphate in Agriculture

Manganese Sulphate is an essential agricultural micronutrient fertilizer used to correct manganese deficiencies in soil and plants. It supplies manganese (Mn²⁺) in a soluble, plant-available form. Manganese plays several crucial physiological roles in crop development, yield, and quality.

✅ 1. Corrects Manganese Deficiency in Soil & Plants

Primary Use:
The most common use of manganese sulphate is to treat manganese deficiency in soils and crops. Deficiency symptoms include:

• Interveinal chlorosis (yellowing between leaf veins)

• Reduced root growth

• Stunted plant growth

• Poor fruit set or grain formation

Common in: Alkaline, sandy, organic-rich, or over-limed soils, where Mn becomes insoluble and unavailable to plants.

MnSO₄ is highly effective because it is highly water-soluble and rapidly absorbed by plant roots and leaves.

🧬 2. Key Role in Plant Metabolic Functions

Manganese is a cofactor for several enzymes. It plays a crucial role in:

• Photosynthesis: It is involved in photolysis of water (splitting water) during photosynthesis.

• Chlorophyll synthesis: Essential for leaf greenness.

• Nitrogen metabolism: Assists in nitrogen assimilation and protein synthesis.

• Carbohydrate metabolism: Helps in sugar transport and storage.

Without manganese, these metabolic functions are impaired, leading to significant yield loss.

🍀 3. Enhances Disease Resistance and Stress Tolerance

Manganese strengthens plant cell walls by promoting lignin synthesis. This makes plants:

• More resistant to fungal and bacterial pathogens

• Better able to handle abiotic stress like drought and salinity

Example: In wheat, adequate Mn helps prevent take-all root rot. In citrus, it reduces gummosis susceptibility.

🌾 4. Improves Crop Yield and Quality

Manganese sulphate contributes to:

• Improved grain filling in cereals

• Better fruit size and sweetness in fruits

• Uniform vegetative growth

• Early maturity and flowering

Manganese deficiency during early stages often leads to poor root growth and weak plant structure, directly impacting final yield.

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DOSAGE:

💧 1. Hydroponics / Constant-Feed Systems

• Stock Solution:
  Dissolve 0.9–1 g of Manganese Sulphate per litre of water to create a concentrated solution.

• Working Dosage:
  Use 2.5 mL of stock solution per litre of nutrient solution to achieve 1.5 ppm Mn in hydroponic systems.

• Application Frequency:
  Continuous feeding or weekly replenishment depending on system type.

🌿 2. Foliar Spray Application

• Timing: Spray during early vegetative growth or immediately upon noticing deficiency symptoms.

• Spray Volume: 200–300 L/acre (depending on crop canopy).

🌾 3. Soil Application Dosage (Broadcast or Band)

• Incorporate into soil before or at planting for best availability.

• For alkaline soils, use the higher end of the range or the foliar route.

🍊 4. Crop-Wise Application Guide

🧪 5. Ideal Manganese Levels for Crops

• Leaf Tissue Sufficiency: 20–200 ppm

• Deficiency Level: < 20 ppm

• Soil Mn Level:

  • Deficient if < 3–10 ppm (DTPA extractable)

  • Optimum: 10–50 ppm

⚠️ 6. Important Usage Notes

• Always check soil pH. High pH (>6.5) soils tie up manganese; foliar application is preferred in such cases.

• Avoid overuse – manganese toxicity can occur, especially in acidic soils.

• Use clean water for foliar applications to prevent clogging and leaf burn.

• Compatible with most fertilizers and pesticides, but do a jar test before mixing.

📘 7. Conversion Reference

🧑🌾 Consultation Note

Before applying manganese sulphate:

• 📋 Always perform a soil and leaf tissue analysis to determine actual Mn deficiency levels.

• 🧪 Choose application method based on deficiency severity, soil pH, and crop type.

• 🛑 Over-application may lead to nutrient imbalance or toxicity, especially in low-pH soils.

• ✅ For tailored recommendations and safe use, consult an agronomist or local agricultural officer.