Potassium deficiency results in a characteristic pattern of leaf discoloration by small whitish-yellow spots, followed by scorching or browning of the leaf edge of lower, older leaves. Intercostal chlorosis occurs toward the leaf base. Young leaves show a blue tint.
Acidic soils (low pH). Sandy or light soils (leaching). Drought conditions. High rainfall (leaching). or heavy irrigation. Heavy clay (illite) soils. Soils with low K reserves. Magnesium rich soils.
Lusher, greener growth. Improved plant development. Increased yield and grain quality.
Potassium deficiency
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Cereals: 5 l/ha from early tillering to 2nd node detectable (Zadoks G.S. 21 to 32). Repeat at 10 to 14 day intervals between these growth stages as necessary. From 2nd node detectable onwards apply 5 l/ha, if necessary, up to the end of inflorescence (Zadoks G.S. 32 to 59). Water rate: 50 to 200 l/ha.
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Cereals: 5 l/ha at tillering. Repeat at 10-14 day intervals if necessary. Also apply from ear emergence until the end of flowering (Zadok's G.S. 51 to 69). Water rate: 200 l/ha.
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Cereals: 5 l/ha at tillering. Repeat at 10 to 14 day intervals if necessary. Water rate: 200 l/ha.
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Cereals: 2.5 kg/ha. Repeat at 10 to 14 day intervals as necessary. Avoid applications during flowering. Water rate: 200 l/ha.
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