Nitrogen deficiency-Table Grape

Change crop

Nutrients

Grapevines - Growth retardation

Symptoms
The older leaves become pale green or yellow, growth is clearly stunted. Young shoots, petioles and cluster stems become pink or red, regardless of the cultivar. Under drought conditions, the leaf margins roll slightly upwards, wilt and dry up. At severe deficiency, necrotic areas develop on basal leaves, and older leaves may wither and die off.

Reasons
Nitrogen deficiency Water shortage and some injuries of roots or trunks caused mechanically or by parasites that hinder the absorption and transport of nutrients lead sooner or later to stunted growth and lighter colored leaves, which may be confused with N deficiency.

Grapevines - Growth retardation

Symptoms
The older leaves become uniformly pale green or yellow. With ongoing deficiency, the discoloration spreads over the entire foliage. Young shoots, petioles and cluster stems show a pink or red tint, regardless of the cultivar.

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

Improved crop vigor and development
Increased fruit set, yield and quality
Improved berry color and wine quality

Yara recommended fertilizers for Nitrogen

YaraTera CALCINIT

Grapevines: Apply 140-350 kg/ha in multiple applications from growth stage; early shoot growth to post harvest. Refer to Yara crop program as a guide or contact your local Yara sales agronomist for advice.

YaraMila COMPLEX

Apply 150-300 kg/ha in multiple applications at growth stage; bud burst and post harvest. Refer to Yara crop program as a guide or contact your local Yara sales agronomist for advice.