Manganese Carbonate SC 48% – Uses, Dosage & Application

Manganese Carbonate SC 48% is a straight micronutrient fertilizer registered under India's Fertilizer (Control) Order, 1985 (FCO), supplied as a suspension concentrate (SC) for soil and foliar application. Since fertilizers fall under the FCO rather than the Central Insecticides Board (CIB), the crop, symptom and dosage information on this page is drawn from Punjab Agricultural University (PAU) and agricultural-university package-of-practices guidance on manganese deficiency management, along with the product's own FCO label application rate.

Which Deficiency Symptom Is This For? (Symptom Guide)

Manganese deficiency is common on alkaline, calcareous and over-limed soils, and on light sandy soils prone to leaching. It shows up as interveinal chlorosis and grain/growth disorders, mainly on younger to middle leaves. The table below lists crops where this deficiency is typically seen and its field symptoms.

Mode of Action

Manganese is an essential cofactor for enzymes involved in photosynthesis (specifically the oxygen-evolving complex of photosystem II), respiration and lignin synthesis, and it also supports nitrogen metabolism. Manganese carbonate applied as a suspension concentrate breaks down gradually in the soil or on the leaf surface to release plant-available manganese, giving a more sustained supply than a fully water-soluble salt. Because manganese availability drops sharply in alkaline and calcareous soils, a targeted application is often needed even where total soil manganese is adequate.

Features & Benefits

• Corrects manganese deficiency causing grey speck in wheat and interveinal chlorosis in paddy, sugarcane, vegetables and citrus.
• Supports the photosynthetic and respiratory enzyme systems that depend on manganese as a cofactor.
• Suspension concentrate (SC) form allows both soil application and foliar spray use.
• More sustained manganese release than fully soluble salts, useful on soils prone to leaching.
• Particularly effective in correcting deficiency on alkaline, calcareous or over-limed fields where manganese becomes locked up.
• Compatible with general NPK and other micronutrient fertilizer programmes on manganese-deficient soils.

Recommended Usage

Manganese carbonate recommendations from agricultural sources are typically given per hectare for soil application and as a percentage/volume-based rate for foliar spray. The doses below convert the per-hectare soil rate to a per-acre figure and give the foliar rate as commonly followed for this formulation.

Source recommendations are given per hectare (20–50 kg/ha for basal soil application, 1–2 kg/ha for foliar spray) and are converted to the per-acre figures shown using 1 hectare ≈ 2.47 acres. These reflect agricultural-extension guidance for manganese carbonate and the product's own FCO label; confirm the exact label rate and, for basal application, base repeat doses on a soil test since manganese availability depends heavily on soil pH.

How to Use

1. Confirm manganese deficiency before use — look for grey speck in wheat or interveinal chlorosis in other crops, and where possible confirm with a soil test, especially on high-pH soils.
2. For soil (basal) application, broadcast the required quantity evenly and incorporate into the top soil layer before sowing or planting, or apply in a band near the row.
3. For foliar correction, shake the suspension concentrate well before use, dilute in the specified water volume and spray using a knapsack or power sprayer with a fine nozzle for even coverage.
4. Apply foliar sprays during the cooler part of the day (early morning or evening) to reduce evaporation and leaf scorch risk.
5. Avoid tank-mixing with strongly alkaline products unless compatibility is confirmed.
6. Repeat foliar sprays only if deficiency symptoms persist; avoid repeated heavy basal doses on soils that are not manganese-deficient.

Precautions & Safety

• Shake well before use, as this is a suspension concentrate and settling is normal on standing.
• Wear gloves and a mask while handling, mixing and applying, as a routine precaution for any fertilizer input.
• Avoid foliar spraying during peak heat, bright sunshine or before rain.
• Keep away from direct contact with eyes and skin; wash immediately with water if contact occurs.
• Store in the original, tightly closed pack in a cool, dry place away from direct sunlight and frost, and out of reach of children and livestock.
• Wash hands, face and any exposed skin thoroughly with soap and water after handling or spraying.

Brand names mentioned on this page are registered trademarks of their respective owners and are referenced here for identification purposes only; FarmMate is not affiliated with or endorsed by these brands. This page is for general information only — always consult your local agricultural extension office and confirm the current product label before use.