Oireet
Before specific symptoms occur, potassium deficiency causes growth and yield depressions of the plants. Younger leaves remain smaller, and later, growth of the plants is stopped. Specific deficiency symptoms occur on medium/older leaves first. They show chlorotic zones on the leaf margins which become necrotic later. The younger leaves get a blue-green colour.
Syyt
Potassium deficiency
Mg deficiency also shows chlorosis and necrosis on older leaves, but these start from the middle part of the leaf whereas K deficiency symptoms occur on the leaf margins first.
Oireet
Specific deficiency symptoms occur on medium/older leaves first. Starting from the leaf margin, chlorosis spreads over the leaf blade. Later on, the chlorotic zones along the leaf margins become necrotic.
Syyt
Potassium deficiency
Mg deficiency also shows chlorosis and necrosis on older leaves, but these start from the middle part of the leaf whereas K deficiency symptoms occur on the leaf margins first.
Oireet
Before specific symptoms occur, potassium deficiency causes growth and yield depressions of the plants. Younger leaves remain smaller, and later, growth of the plants is stopped.
Specific deficiency symptoms occur on medium/older leaves first.
Starting from the marginal area, the leaves become chlorotic and subsequently show necrotic spots and patches. The necrotic tissue can show a pale, light brown colour, similar to sun burn damage.
Syyt
Potassium deficiency
Mg deficiency also shows chlorosis and necrosis on older leaves, but these start from the middle part of the leaf whereas K deficiency symptoms occur on the leaf margins first.
Oilseed Rape: 5 l/ha at the 4 to 6 leaf stage. Repeat as required for moderate to severe deficiency at 7 to 14 day intervals, up to the green bud stage. Do not apply during flowering. Water rate: 200 l/ha.
Lue lisää YaraVita FOLIAR POTASHOilseed Rape: For a single application, 5 l/ha at onset of stem extension. For moderate deficiency, 5 l/ha at 4 to 6 leaf stage and at onset of stem extension. An extra application can be made 10 to 14 days later for severe deficiency. Water rate: 200 l/ha
Lue lisää YaraVita MAGPHOS K