Nitrogen deficiency

When the nitrogen supply is disrupted, the various organs of plants are smaller, and diminished returns. Nitrogen deficiency leads to a lower stocking density (tillering), to early fruiting and reduced protein content. Poor or excessive supply of N decreases quality.

Nitrogenous deficiency of the corn

Symptoms: The plant is small, the first green leaves with yellow yellowish become more or less orange and fall.
Deficient soils: inadequately fertilized soils; often sandy soils, filter, acidic or low in humus.
Remedies:

• Nitrogen contribution to the soil or foliar fertilization. 
• Drainage too wet (reduced denitrification). 
• Improving soil structure. 
• Additional nitrogen intake in case landfill straws (C / N ratio less than 20). 
• Use of green manure avoiding N leaching in winter (when the weather conditions fall permitting)