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Symptoms of deficiency

Stunted growth, small pale leaves, stiff habitus, root/shoot ratio large, lodging resistance high, premature ripening.

Limited reproductive production. Reduced resistance to drought, increased susceptibility to fungal infections.

Symptoms of excess fertilisation

Luxuriant, large deep green leaves, soft growth, root/shoot ratio small, lodging resistance low (often lodges), maturation delayed. Limited reproductive production. Reduced resistance to drought, increased susceptibility to fungal Infections.

Winter wheat: N requirements in spring g. 100-œ

Deficiency acute latent

Optimum

Luxuriant

Toxic latent: acute

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