Potassium deficiency-Wheat | Yara South Africa

Symptoms
Leaves are blueish green with chlorotic tips and margins. Growth is reduced due to shortened internodes as deficiency becomes more severe.

Reasons
Potassium deficiency Mild damage from herbicides may give similar symptoms.

Cereals - Chlorosis

Symptoms
Yellow-white streaking of leaves is one of several possible symptoms of K deficiency. Normally 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.

Reasons
Potassium deficiency

Cereals - Growth retardation

Symptoms
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.

Reasons
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.

Cereals - Chlorosis

Symptoms
Scorching or browning of the leaf tip and edge of older leaves is characteristic for K deficiency. Starting from the leaf tip, the bottom leaves desiccate prematurely. Leaf color in the present case is rather yellowgreen than bluish. Total leaf and plant size are severely reduced.

Reasons
Potassium deficiency

Cereals - Chlorosis

Symptoms
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.

Reasons
Potassium deficiency

Potassium deficiency made worse by

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

Potassium is important for

Lusher, greener growth
Improved plant development
Increased yield and grain quality

Yara recommended fertilizers for Potassium

YaraVita CROP BOOST

Cereals: 3 - 5 l/ha from the 2 leaf stage to 1st node detectable, (Zadok's G.S. 12 to 31). Repeat at 10 to 14 day intervals if necessary within this time-frame, up to a maximum of three applications. Water rate: 50 to 200 l/ha.