Nitrogen deficiency vs. optimum-Lettuce

Change crop

Nutrients

Lettuce - Growth retardation

Symptoms
Symptoms of nitrogen deficiency start on older leaves with light green clorosis. Later the whole head is affected and looks yellow green. Strongly restricted growth and delayed crop development are further symptoms. Older leaves may decay. The shape of the leaves remains normal. With severe N deficiency, no head is formed.

Reasons
Nitrogen deficiency (right) Symptoms may be confused with magnesium, sulfur or manganese deficiency. With magnesium deficiency leaves become yellowish but in this case the veins remain green. Sulphur deficiency also shows yellowish leaves, but symptoms start from the younger leaves here. Furthermore, leaves are less crinkled than normal. Symptoms of manganese deficiency also show yellowish leaves, but growth is less restricted, the veins of the leaves remain green and brown necrotic spots appear on the edge of the leaves.

Lettuce - Growth retardation

Reasons
Nitrogen deficiency Symptoms may be confused with magnesium, sulfur or manganese deficiency. With magnesium deficiency leaves become yellowish but in this case the veins remain green. Sulfur deficiency also shows yellowish leaves, but symptoms start from the younger leaves here. Furthermore, leaves are less crinkled than normal. Symptoms of manganese deficiency also show yellowish leaves, but growth is less restricted, the veins of the leaves remain green and brown necrotic spots appear on the edge of the leaves.

Lettuce - Growth retardation

Symptoms
Symptoms of nitrogen deficiency start on older leaves with light green clorosis. Later the whole head is affected and looks yellow green. In varieties with anthocyanin, the leaves may have a purple flush. Strongly restricted growth and delayed crop development are further symptoms. Older leaves may decay. The shape of the leaves remains normal. With severe N deficiency, no head is formed.

Reasons
Nitrogen deficiency (right) compared to optimum supply (left) Nitrogen deficiency may be confused with magnesium, sulfur or manganese deficiency. With magnesium deficiency leaves become yellowish but in this case the veins remain green. Sulphur deficiency also shows yellowish leaves, but symptoms start from the younger leaves here. Furthermore, leaves are less crinkled than normal. Symptoms of manganese deficiency also show yellowish leaves, but growth is less restricted, the veins of the leaves remain green and brown necrotic spots appear on the edge of the leaves.

Lettuce - Growth retardation

Reasons
Nitrogen deficiency on leaves and roots Nitrogen deficiency may be confused with magnesium, sulfur or manganese deficiency. With magnesium deficiency leaves become yellowish but in this case the veins remain green. Sulfur deficiency also shows yellowish leaves, but symptoms start from the younger leaves here. Furthermore, leaves are less crinkled than normal. Symptoms of manganese deficiency also show yellowish leaves, but growth is less restricted, the veins of the leaves remain green and brown necrotic spots appear on the edge of the leaves.

Lettuce - Elongation, excessive

Symptoms
Plants with nitrogen deficiency develop very long main roots and less secondary roots than normal.

Reasons
Nitrogen deficiency on roots

Nitrogen deficiency vs. optimum 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

High and early yields, good leaf size, head formation and market quality

Yara recommended fertilizers for Nitrogen

YaraBela® CAN-27™

Lettuce (field grown): Apply 60-160 lbs N/acre in split applications according to yield potential and soil test. Apply no more than 25% N needs at planting. Apply the remainder in 2-3 side dress applications. Utilizing YaraBela® CAN 27 for part or all of the nitrogen needs supplies the crop with fast acting nitrate nitrogen. Consult with your agronomist for local recommendations.

YaraMila® 15-15-15

Lettuce (field grown): Apply 400-1000 lbs YaraMila® 15-15-15/acre in split applications according to yield potential and soil test. Apply no more than 25% of product at planting. Apply the remainder in 2-3 side dress applications. Utilizing 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. Consult with your agronomist for local recommendations.

YaraMila® 21-7-14

Lettuce (field grown): Apply 275-750 lbs YaraMila® 21-7-14 /acre in split applications according to yield potential and soil test.. Apply the remainder in 2-3 side dress applications. YaraMila® 21-7-14 provides fully available Phosphate along with Nitrogen, Potassium and Sulfur, in a homogenous prill. Consult with your agronomist for local recommendations.

YaraLiva® CALCINIT™15.5-0-0

Lettuce (field grown): Apply 375-1000 lbs YaraLiva® Calcinit® 15.5-0-0 19 Ca/acre in split applications according to yield potential and soil test. Apply no more than 25% N needs at planting. Apply the remainder in side dress applications via fertigation. 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 in reducing tip burn, and producing crunchy lettuce with a good shelf life. Consult with your agronomist for local recommendations.

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

YaraLiva® CAN-17™

Lettuce (field grown): Apply up to 350-950 lbs YaraLiva® CAN-17/acre in split applications according to yield potential and soil test. Apply no more than 25% N needs at planting. Apply the remainder in side dress applications via fertigation. 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 in reducing tip burn, and producing crunchy lettuce with a good shelf life. Consult with your agronomist for local recommendations.

YaraLiva® CN-9®

Lettuce (field grown): Apply up to 375-1775 lbs YaraLiva® CN-9® 9-0-0 11 Ca/acre in split applications according to yield potential and soil test. Apply no more than 25% N needs at planting. Apply the remainder in side dress applications via fertigation. 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 in reducing tip burn, and producing crunchy lettuce with a good shelf life. Consult with your agronomist for local recommendations.

YaraLiva® TROPICOTE®

Lettuce (field grown): Apply 375-1000 lbs YaraLiva® Tropicote® 15.5-0-0 19 Ca/acre in split applications according to yield potential and soil test. Apply no more than 25% N needs at planting. Apply the remainder in side dress applications. 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 in reducing tip burn, and producing crunchy lettuce with a good shelf life. Consult with your agronomist for local recommendations.

NUTRA-PHOS Zn-K PLUS

Lettuce (field grown): 2 to 10 lb. per acre per application. Make several applications at intervals of 2 to 3 weeks starting at thinning period. 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.