Sulphur deficiency-Tomato | Yara South Africa

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Nutrients

Tomato - Chlorosis

Symptoms
Chlorosis starts from the younger leaves and proceeds to the older leaves with ongoing deficiency. Leaves are uniformly light green or yellow.

Reasons
Sulphur deficiency on leaves Sulphur deficiency is similar in appearance to nitrogen deficiency, however it begins in younger leaves because sulfur is not as mobile as nitrogen within the plant.

Tomato - Chlorosis

Symptoms
Sulphur is not as mobile as nitrogen within the plant. For that reason symptoms start on younger leaves and progress to older plant parts.The leaves are stiff and curled downward. They develop an interveinal chlorosis turning yellowish green to yellow. Stems, veins and petioles look purple. When nitrogen is deficient, leaves are small and uniformly pale green to yellow in color. Symptoms are first seen in the old leaves and gradually progress to new growth. The plant appears thin and upright. With severe deficiency the old leaves become completely yellow or turn brown before dropping from the plant. Stems and veins look purple. Growth is clearly stunted.

Reasons
Sulphur deficiency (right) compared to nitrogen deficiency (middle) and optimum supply (left)

Sulphur deficiency made worse by

Acidic soils
Light, sandy soils (leaching)
Low organic matter
Poorly aerated soils (waterlogged soils
) Areas with low industrial emissions

Sulfur is important for

Protein development (amino acid)
Coenzyme A Vitamins

Yara recommended fertilizers for Sulfur

YaraBela SULFAN

YaraRega AQUAFLEX 13

Tomato (field grown): Exact recommendation depends on soil analysis, yield potential, fertigation practices and nutrient management plan. Refer to your local Yara Agronomist for detailed recommendation.

YaraRega AQUAFLEX 18

Tomato: Exact recommendation depends on soil analysis, yield potential, fertigation practices and nutrient management plan. Refer to your local Yara Agronomist for detailed recommendation.