Nitrogen deficiency-Corn | Yara United States

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Nutrients

Corn - Growth retardation

Symptoms
Affected plants show stunted, sparse growth. The leaves turn uniformly pale green. The oldest leaves on the bottom show yellow discoloration and subsequent necrosis proceeding from the leaf tip.

Reasons
Nitrogen deficiency. Sulfur deficiency can cause similar symptoms but starts on the younger leaves, whereas paling due to N deficiency is detectable on older leaves first.

Corn - Size reduced

Symptoms
Reduced cob size and uncomplete cob fill due to N deficiency.

Reasons
Nitrogen deficiency on cob (right)

Corn - Growth retardation

Symptoms
Affected plants show spindly, sparse growth. On the older leaves, V-shaped yellowing on the leaf tips progresses towards the base, so that leaves finally turn uniformly pale green/yellow. Stalks get a reddish discoloration. The oldest leaves on the bottom become necrotic.

Reasons
Nitrogen deficiency. Sulfur deficiency can cause similar chloroses but starts on the younger leaves, whereas paling due to N deficiency is detectable on older leaves first.

Corn - Deformation

Symptoms
Leaves turn pale green/yellow beginning along main vein and then from leaf tip (V-shape). Necrosis develops from leaf tip as deficiency continues.

Reasons
Nitrogen deficiency. Sulfur deficiency can cause similar symptoms but starts on the younger leaves, whereas paling due to N deficiency is detectable on older leaves first.

Corn - Chlorosis

Symptoms
Leaves turn pale green/yellow beginning along main vein and then from leaf tip (V-shape). Necrosis develops from leaf tip as deficiency continues.

Reasons
Nitrogen deficiency. Sulfur deficiency can cause similar symptoms but starts on the younger leaves, whereas paling due to N deficiency is detectable on older leaves first.

Corn - Growth retardation

Symptoms
Affected plants show stunted, sparse growth. The leaves turn uniformly pale green.

Reasons
Nitrogen deficiency. Sulfur deficiency can cause similar chloroses but starts on the younger leaves, whereas paling due to N deficiency is detectable on older leaves first

Corn - Growth retardation

Symptoms
Growth of the complete plant is stunted, leaves and stem show an overall chlorosis. Older leaves are affected most; they turn yellow and die off prematurely. The stem base shows a reddish discoloration. Cob development is inhibited.

Reasons
Different levels of nitrogen deficiency vs control (from left to right).

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

Lusher, greener growth
Increased yields and grain quality
Better cob formation and production

Yara recommended fertilizers for Nitrogen

YaraVera® AMIDAS® 40-0-0

Maize: 200-400 lbs YaraVera® Amidas® 40-0-0/acre depending upon yield expectations and soil test. Approximately 30% applied at planting, with the balance applied before or at V6. Consult your agronomist for local recommendations. YaraVera® Amidas™ is an excellent source of readily available sulfate sulfur. It is delivered in a 7.3:1 N to S ratio which is ideal for amino acid and protein production.

Read more about YaraVera® AMIDAS® 40-0-0

NUTRA-PHOS Zn-K PLUS

Maize: 3 to 10 lb. per acre per application. 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.