Magnesium deficiency-Oil Palm

Symptoms
The leaflets (pinnae) of mature fronds show a yellowgreen chlorosis, starting on tips and margins and progressing toward the leaf base. A narrow area along the midrib remains green for a while. Finally the leaflets turn yellow and brown, necrotic blotches develop on the margin.

Reasons
Magnesium deficiency Mg deficiency may occur either on light soils with a rate of exchangeable Mg <0.2 cmol/kg soil, but may also be induced by high concentrations of other cations in the soil. Shaded parts of the leaves remain green at Mg deficiency, whereas the leaves exposed to the sun turn yellow. Severe Mg deficiency is also called ‚Sun-Scorch‘.

Symptoms
The leaflets (pinnae) of mature fronds show a yellowgreen chlorosis, starting on tips and margins and progressing toward the leaf base. A narrow area along the midrib remains green for a while. Finally the leaflets turn yellow and brown, necrotic blotches develop on the margin.

Reasons
Magnesium deficiency Mg deficiency may occur either on light soils with a rate of exchangeable Mg <0.2 cmol/kg soil, but may also be induced by high concentrations of other cations in the soil. Shaded parts of the leaves remain green at Mg deficiency, whereas the leaves exposed to the sun turn yellow. Severe Mg deficiency is also called ‚Sun-Scorch‘.

Symptoms
Pinnae of older palm fronds become chlorotic, because Mg is translocated from older to younger leaves. At severe deficiency, the pinnae turn yellow, then brown, and desiccate, starting from the leaf tips.

Reasons
Magnesium deficiency Mg deficiency may occur either on light soils with a rate of exchangeable Mg <0.2 cmol/kg soil, but may also be induced by high concentrations of other cations in the soil. Shaded parts of the leaves remain green at Mg deficiency, whereas the leaves exposed to the sun turn yellow. Severe Mg deficiency is also called ‚Sun-Scorch‘.

Symptoms
Pinnae of older palm fronds become chlorotic, because Mg is translocated from older to younger leaves. At severe deficiency, the pinnae turn yellow, then brown, and desiccate, starting from the leaf tips.

Reasons
Magnesium deficiency Mg deficiency may occur either on light soils with a rate of exchangeable Mg <0.2 cmol/kg soil, but may also be induced by high concentrations of other cations in the soil. Shaded parts of the leaves remain green at Mg deficiency, whereas the leaves exposed to the sun turn yellow. Severe Mg deficiency is also called ‚Sun-Scorch‘.