Sulfur deficiency-Tomato | Yara United States

Change crop

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

Tomato - Chlorosis

Symptoms
Sulfur 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
Sulfur deficiency (right) compared to nitrogen deficiency (middle) and optimum supply (left)

Sulfur 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

YaraMila® 15-15-15

Tomato (field grown): Apply 300-1000 lbs YaraMila® 15-15-15/acre according to variety, yield potential, and soil test. YaraMila® 15-15-15 provides a balanced nitrogen approach by supplying both nitrate and ammoniacal nitrogen along with fully available Phosphate, soluble Potassium and Sulfur in a homogenous prill. Consult with your agronomist for local recommendations.

NUTRA-PHOS CALZINC

Tomato (field grown): 3 to 10 lb. per acre per application. One to three applications are advised at 3 to 4 week intervals, starting at period prior to bloom. Repeat as needed. Apply aerial applications in at least 5 gallons/acre and ground applications in at least 10 gallons/acre; however, when total application gallonage is 25 gallons per acre or less, DO NOT mix more than 1 lb. of this product per gallon of water.

SULFATE OF POTASH - GRANULAR 0-0-50

Tomato (field grown): Apply up to 100-425 lbs Sulfate of Potash/acre according to soil analysis throughout the growing season. Utilizing Sulfate of Potash from Yara for part or all of your potassium needs provides your crop with water soluble potassium along with sulfate sulfur. Consult with your agronomist for local recommendations.

Read more about SULFATE OF POTASH - GRANULAR 0-0-50