YaraVita MAGPHOS K
Potatoes: To stimulate early growth: 5 l/ha one week after 100 percent crop emergence.
To increase tuber number: 10 l/ha at tuber initiation (when 50 percent at the tip swellings are twice the diameter of the rest of the stolon).
To increase tuber size: a minimum of 2 applications of 5 l/ha or 1 to 2 applications of 10 l/ha during tuber bulking ( as soon as first formed tubers are 10mm in diameter) and following petiole analysis during tuber bulking. Allow 10 to 14 days between applications.
Water rate: 200 l/ha.