Docto-Zinc 15

Docto-Zinc 15 is manufactured under the quality assurance of Doktor Tarsa. Every product offered for sale complies with the criteria of the European Union Fertilizer Regulation. Doktor Tarsa is certified with the TS EN ISO 9001:2000 Quality Management System, ensuring that all processes and products meet international quality standards.

Content

CONTENT	% w/w
Water-Soluble Zinc (Zn)	15%
Zinc (Zn) EDTA ChelatedWater Soluble	15%

Docto-Zinc 15

Essential for Plant Growth and Enzyme Activation

The Role of Zinc in Plants
Zinc is a crucial micronutrient that acts as a catalyst in many enzymatic systems within plants. Zinc-containing enzymes are vital for starch synthesis and nitrogen metabolism. Additionally, zinc regulates the synthesis of the amino acid tryptophan, which stimulates the production of auxin—an essential growth hormone.

Zinc Availability in Soil
In many soils, zinc is bound to organic complexes, making it unavailable to plants. High soil pH significantly reduces zinc solubility and uptake. Furthermore, excessive phosphorus fertilization can induce zinc deficiency, even in soils with adequate total zinc content.

Crops Sensitive to Zinc Deficiency
Zinc deficiency commonly affects a wide range of crops including wheat, maize, cotton, rice, barley, oats, beans, leafy vegetables, citrus, grapes, apples, and pears.

Symptoms of Zinc Deficiency
Typical signs include shortened internodes and chlorosis in young leaves. Yellow spotting may appear, and in fruit trees, bud, shoot, and leaf development for the following season may be impaired. Premature leaf drop, delayed growth, and disrupted cell expansion are also frequently observed.

Docto-Zinc 15 provides a highly effective and readily available source of zinc, supporting plant health, development, and productivity across diverse soil conditions.

Recommended Dosage and Application Timing – Docto-Zinc 15

Crop	Dosage	Application Timing
Wheat, Barley, Oats, Soybean, Peanut, Corn, Bean, Pea, Rice, Sorghum, Cotton, Sugar Beet	Soil: 200–400 g/da Foliar: 100–200 g/da Seed: 200 g/100 kg seed	Apply annually before planting until deficiency is corrected. For preventive use, repeat every 3 years. Foliar applications should begin as soon as sufficient leaf growth occurs. Apply before symptoms appear.
Citrus	Foliar: 100–200 g/da	Apply to new spring shoots. Repeat if necessary. Do not apply during flowering or immediately before harvest.
Olive	Foliar: 100 g/da	Apply at bud break in early spring and repeat after 3–4 weeks.
Apple, Pear	Foliar: 100 g/da	Apply before flower bud burst and repeat after harvest.
Apricot, Peach, Plum	Foliar: 100 g/da Soil: 0.5–1 kg/tree (based on tree size)	Apply after harvest. Do not exceed recommended doses to avoid leaf burn. In severe deficiency, apply regularly using sprayer, injector, or watering can.
Walnut, Cherry	Foliar: 50–200 g/da	Apply immediately after flowering. Repeat twice at 2–3 week intervals.

Soil Application – General Recommendations

Vegetables, Ornamental Plants: 0.1 – 0.3 kg/da
Fruit Trees: 10 – 80 g/plant (depending on tree size)

Application Timing

For optimal foliar absorption of trace elements, it is recommended to apply during the early morning or late evening hours.

Water Volume Recommendations

Foliar Applications: Use enough water to ensure thorough wetting of the leaf surface.
- Field Crops: Minimum 30 L/da
- Trees and Shrubs: Minimum 50 L/da