Quantum ExtraPhos K

Quantum ExtraPhos K is a liquid specialty fertilizer with a high concentration of potassium and phosphorus in phosphite form. It is intended for foliar feeding of field, vegetable, fruit, berry and ornamental crops. The product is described as supporting crop resistance to pathogens, yield quality and productivity.

Composition and properties

Phosphorus (P₂O₅): 25.0% (250 g/L).
Potassium (K₂O): 25.0% (250 g/L).
pH: 5.0–6.0; density: 1.24–1.29 kg/L.

Action and effects

Supports root growth and the plant's response to pathogen pressure.
Helps improve produce quality and tolerance of drought and temperature fluctuations.
The phosphite component is described as supporting biochemical processes and plant defense mechanisms.

Application

For foliar application, the Ukrainian product page recommends a spray solution volume of 200–400 L/ha for field and vegetable crops and 500–1,000 L/ha for vineyards and fruit crops. Prepare the solution immediately before use and keep it mixed while adding products to the tank.

Foliar feeding rates

Field and vegetable crops: 1.0–2.5 L/ha.
Fruit and berry crops: 0.1–0.5 L/ha.

Drip fertigation

The stated rate is 2–4 L/ha, depending on crop and plant condition. The source page advises against exceeding a 2% working-solution concentration (2 L per 100 L of water) per application.

Compatibility

The product may be applied with crop protection products and other fertilizers. Check the intended mixture before use: it should not form a precipitate; slight cloudiness is acceptable.

Field crops

Vegetable crops

Fruit and berry crops