DoctoFerro 5.25

DoctoFerro 5.25 is manufactured under Doktor Tarsa's quality assurance. Every product offered for sale complies with the European Union Fertilizer Regulation standards. Doktor Tarsa is certified with the TS EN ISO 9001:2000 Quality Management System, and its products meet international quality standards. DoctoFerro 5.25 can be safely used not only in soil-based cultivation, but also in soilless growing systems. If necessary, it can also be applied via foliar spraying.

Product Varieties

Content
CONTENT % w/w
Water Soluble Iron (Fe) 6%
Iron (Fe) EDTA ChelatedWater Soluble 6%
Iron (Fe) Chelated with Ortho-Ortho EDDHA 5.25%
pH Range pH 4 – pH 12

DoctoFerro 5.25 

Iron: Essential for Plant Vitality

Iron is one of the vital micronutrients required for essential metabolic activities in plants. It plays a key role in chlorophyll synthesis and is involved in oxidation-reduction reactions within plant cells.
When iron deficiency develops, the first symptoms typically appear as interveinal chlorosis on young leaves, where the leaf veins remain green while the surrounding tissue turns yellow. This leads to impaired photosynthesis, resulting in reduced yield and quality.


Why Does Iron Deficiency Occur Despite Iron-Rich Soils?

In Mediterranean countries such as Italy, Spain, and Turkey, soils may be naturally rich in iron. However, due to high pH levels, iron becomes bound in the form of iron hydroxides, which are insoluble and thus unavailable to plants.
Even though total soil iron may be sufficient, plants may still exhibit chlorosis. As long as pH remains high, the iron in the soil is not plant-available. In these cases, chelated iron fertilizers must be regularly applied.
Among the various iron chelates, EDDHA is considered the most effective for soil application, especially in high pH soils. Within EDDHA chelates, those with a high percentage of the ortho-ortho isomer are the most efficient and stable.


What Makes DoctoFerro 5.25 So Effective?

DoctoFerro 5.25 contains iron chelated with EDDHA, with a high ortho-ortho isomer content, ensuring exceptional stability and availability in alkaline soils.

Chelates are molecules that protect essential metal nutrients from becoming unavailable in the soil. A chelate is composed of three parts:

  • The metal ion (e.g., Fe³⁺),

  • The chelating agent (e.g., EDDHA, EDTA, DTPA, amino acids, humic/fulvic acids, citrates),

  • A balancing ion (e.g., Na⁺ or NH₄⁺).

  • Chelates bind the metal ion and prevent it from forming insoluble compounds, making it readily available to the plant. However, the chelate itself does not enter the plant—only the metal ion is absorbed.

Şelatlı demirin kökten alımı

  • Chelate Types, pH Effectiveness, and Practical Use

    There are various chelated forms of micronutrients available on the market. The choice of chelate depends on factors such as its stability at different soil pH levels, mode of application (soil or foliar), and cost-effectiveness for the farmer.

    For micronutrients such as Copper (Cu), Manganese (Mn), and Zinc (Zn), EDTA chelates are commonly used. These chelates are effective for both foliar and soil applications, especially in slightly acidic to neutral soils.

    However, when it comes to iron (Fe), soil application requires a chelating agent that remains stable at high pH levels. Among the available options, EDDHA is the most effective chelate for iron, as scientifically proven. It provides the widest stability range, particularly in alkaline and calcareous soils, which are common in many agricultural regions of our country.

The Importance of Ortho-Ortho in DoctoFerro 5.25

  • DoctoFerro 5.25

    Iron is supplied to the plant through chelation, while the chelating agent remains in the soil. Ortho-ortho chelates can enhance the availability of insoluble iron in the soil and extend the effectiveness of the application compared to ortho-para isomers. This phenomenon is known as the “iron shuttle effect” or “effect transporter.” Research shows that Fe-EDDHA products with high ortho-ortho content are the most effective chelates for soil application.

    DoctoFerro 5.25 EDDHA is a premium iron fertilizer with a high ortho-ortho content. At least 88% of the chelated iron is in the ortho-ortho isomer form, providing a minimum of 5.25% ortho-ortho iron, ensuring exceptional bioavailability. In terms of cost-benefit analysis, it stands out as the most rational choice for iron fertilization.

    DoctoFerro 5.25 is suitable not only for soil-based cultivation but also for soilless systems. If necessary, it can also be applied foliarly with confidence.

Recommended Dosage

Soil Applications

Crop Type Dosage
Seedlings 5 – 10 g / plant
Young fruiting trees 10 – 20 g / tree
Mature trees (normal yield) 30 – 60 g / tree
Mature trees (high yield) 70 – 100 g / tree
Citrus trees (large) 100 – 125 g / tree
Vineyards (per vine) 5 – 10 g / vine
Ornamental plants (roses, carnations, etc.) 300 g / decare
Annual/perennial flowers (chrysanthemums, gerberas, etc.) 350 g / decare
Strawberries, raspberries 400 – 600 g / decare
Vegetables 100 – 150 g / decare
Field crops 75 – 125 g / decare

Foliar Applications

Crop Type Dosage
Vegetables, fruits, vines, turf 100 – 200 g / 100 L of water

Application Areas

DOCTO FERRO 5.25 is used to prevent iron deficiency in all crops. Iron deficiency may arise from low available iron levels in the soil or due to high pH (alkaline) conditions that limit iron uptake by the plant. Iron is essential for photosynthesis, and its deficiency leads to chlorosis, reduced yield, and stunted growth. When used as recommended, leaf color turns green again, allowing the plant to photosynthesize effectively and increase both yield and quality. With its high ortho-ortho content, DOCTO FERRO 5.25 provides effective results at lower doses and offers long-lasting activity.


Application Timing

Apply DOCTO FERRO 5.25 at the first signs of iron deficiency or regularly under intensive farming conditions. The optimal time for fruit trees is in early spring before bud break. The total recommended dose can be split: apply half before bud break and the other half after flowering (during fruit set). Repeat applications as needed.


Method of Application

DOCTO FERRO 5.25 can be applied via drip irrigation and other fertigation systems according to the recommended dosages above. Alternatively, dig a circular trench (15–20 cm deep) under the canopy projection of the tree, apply the recommended dose directly to the trench either dry or dissolved in water, cover with soil, and irrigate. The product is taken up by the roots and distributed throughout the plant.

Also suitable for soilless culture. In solid, hydroponic, or aeroponic systems, dosage should be calculated and applied under expert supervision.


Compatibility

It is recommended to apply DOCTO FERRO 5.25 alone. However, it is compatible with many water-soluble fertilizers and agricultural chemicals. Always perform a compatibility test before broad application. Avoid mixing with high-copper content products.

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