Nutrients

N Nitrogen
P Phosphorus
K Potassium
Mg Magnesium
Ca Calcium
S Sulphur
B Boron
Cu Copper
Fe Iron
Mn Manganese
Zn Zinc
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Maize - 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.

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

Maize - Size reduced

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

Causes
Nitrogen deficiency on cob (right)

Maize - 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.

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

Maize - 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.

Causes
Nitrogen deficiency

Maize - 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.

Causes
Nitrogen deficiency

Maize - Growth retardation

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

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

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 fertilisers for Nitrogen deficiency

YaraVita CROPLIFT PRO

YaraVita CROPLIFT PRO

Maize: 2.5 to 5 kg/ha. Repeat at 10 to 14 day intervals as necessary. Avoid applications during flowering. Water rate: 200 l/ha.

Read more about YaraVita CROPLIFT PRO

YaraVita SAFE-N 300

YaraVita SAFE-N 300

Maize: 10 to 20 l/ha at the 4 to 6 leaf stage, 10 to 14 days later and at the pre-tassel stage. Water rate: 200 l/ha.

Read more about YaraVita SAFE-N 300