Leaves with P deficiency are smaller than normal and show purple tints on their dark green leaves, especially on the middle of the leaf blade. K deficient leaves are even more stunted and their tips are scorched.
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.
P and K deficiency vs. optimum supply Spring cereals may show reddening/purpling of older leaves in cold weather. Root and stem damage or poor soil consolidation can cause similar symptoms, too.
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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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