Nitrogen deficiency-Tomato | Yara United States

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Nutrients

Tomato - Chlorosis

Symptoms
Leaves are small and pale green to yellow in color when nitrogen is deficient. 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.

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

Tomato - Chlorosis

Symptoms
When nitrogen is deficient leaves are small and 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. 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.

Reasons
Nitrogen deficiency (middle) compared to sulfur deficiency (right) and optimum supply (left)

Tomato - Chlorosis

Symptoms
The leaves of the presented tomato plant are uniformly yellowgreen. This chlorosis usually starts from the mature, lower leaves first. The plant has a spindly appearance with sparse growth, although the total height is not reduced. With ongoing starvation the lower (old) leaves become yellow and many develop a purple color before dying prematurely.

Reasons
Nitrogen deficiency (right)

Tomato - Chlorosis

Symptoms
Leaves are small and pale green to yellow in color when nitrogen is deficient. Symptoms are first seen on the old leaves and gradually progress to new growth. With severe deficiency the old leaves become completely yellow or turn brown before dropping from the plant.

Reasons
Nitrogen deficiency. 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
Leaves are smaller and uniformly pale green to yellow in color when nitrogen is deficient. Symptoms are first seen in the old leaves and gradually progress to new growth.

Reasons
Nitrogen deficiency (right). Sulfur deficiency is similar in appearance to nitrogen deficiency, however it starts on younger leaves because sulfur is not as mobile as nitrogen within the plant.

Tomato - Chlorosis

Symptoms
Leaves are smaller and uniformly pale green to yellow in color when nitrogen is deficient. Symptoms are first seen in the old leaves and gradually progress to new growth.

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

Nitrogen deficiency made worse by

Low or high pH soils
Sandy or light soils (leaching)
Low organic matter
Drought conditions
High rainfall (leaching) or heavy irrigation
Addition or high levels of non-decomposed organic matter/manure (eg straw)
Fast growing crops

Nitrogen is important for

Amino acid synthesis
Protein, coenzymes, nucleic acid
Chlorophyll and ATP synthesis

Yara recommended fertilizers for Nitrogen

YaraBela® CAN-27™

Tomato (field grown): Apply 350-700 lbs YaraBela® CAN-27/acre in split applications according to variety, yield potential, and soil test. Utilizing YaraBela® CAN-27 for part or all of the crop’s nitrogen needs supplies the crop with fast acting nitrate nitrogen. Consult with your agronomist for local recommendations.

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.

YaraMila® 21-7-14

Tomato (field grown): Apply 225-950 lbs YaraMila® 21-7-14 /acre in split applications according to variety, yield potential, and soil test. Utilizing YaraMila® 21-7-14 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.

YaraLiva® CALCINIT™15.5-0-0

Tomato (field grown): Apply 600-1200 lbs YaraLiva® Calcinit® 15.5-0-0 19 Ca/acre in split applications according to variety, yield potential, and soil test. Utilizing YaraLiva® Calcinit® for part or all of the nitrogen needs supplies the crop with fast acting nitrate nitrogen and will provide soluble calcium in proper ratio with nitrate nitrogen. Calcium is important for producing firm fleshed fruit as well as preventing disorders such as blossom end rot. Consult with your agronomist for local recommendations.

Read more about YaraLiva® CALCINIT™15.5-0-0

YaraLiva® CAN-17™

Tomato (field grown): Apply up to 575-1150 lbs YaraLiva® CAN-17/acre in split applications via fertigation according to variety, yield potential, and soil test. Utilizing YaraLiva® CAN-17 for part or all of the nitrogen needs supplies the crop with fast acting nitrate nitrogen and since CAN-17 contains 8.8% Calcium it will provide soluble calcium in proper ratio with nitrate nitrogen. Calcium is important for producing firm fleshed fruit as well as preventing disorders such as blossom end rot. Consult with your agronomist for local recommendations.

YaraLiva® CN-9®

Tomato (field grown): Apply up to 1000-2000 lbs YaraLiva® CN-9® 9-0-0 11 Ca/acre in split applications via fertigation according to variety, yield potential, and soil test. Utilizing YaraLiva® CN-9® for part or all of the nitrogen needs supplies the crop with fast acting nitrate nitrogen and will provide soluble calcium in proper ratio with nitrate nitrogen. Calcium is important for producing firm fleshed fruit as well as preventing disorders such as blossom end rot. Consult with your agronomist for local recommendations.

YaraLiva® TROPICOTE®

Tomato (field grown): Apply 600-1200 lbs YaraLiva® Tropicote® 15.5-0-0 19 Ca/acre in split applications according to variety, yield potential, and soil test. Utilizing YaraLiva® Tropicote® for part or all of the nitrogen needs supplies the crop with fast acting nitrate nitrogen and will provide soluble calcium in proper ratio with nitrate nitrogen. Calcium is important for producing firm fleshed fruit as well as preventing disorders such as blossom end rot. Consult with your agronomist for local recommendations.

NUTRA-PHOS Zn-K PLUS

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.