UREA NITROGEN FERTILIZERS (LIQUID & SOLID)

1. Definition

Urea nitrogen fertilizers are nitrogen-rich fertilizers derived from urea (CO(NH₂)₂), widely used in agriculture to provide plants with essential nitrogen for growth.

• Solid forms: granules, prills, or crystals

• Liquid forms: urea dissolved in water or other carriers (commonly called urea-ammonium nitrate solutions)

Urea is highly soluble, making it suitable for both soil application and foliar feeding.

2. Key Properties

• High nitrogen content: typically 46% N in solid urea

• Water solubility: readily dissolves in water for liquid applications

• Neutral pH (slightly alkaline): safe for most soils

• Crystalline/Granular form (solid): easy to store and handle

• Liquid form: uniform nitrogen delivery, compatible with fertigation systems

• Rapid availability: nitrogen is quickly absorbed by plants after application

3. Advantages

• High efficiency: concentrated source of nitrogen

• Flexible application: suitable for soil, foliar, or fertigation

• Cost-effective: widely available and economical

• Improves plant growth: promotes leaf development and crop yield

• Easy storage and handling: especially solid forms

• Blends well: can be combined with other fertilizers for balanced nutrition

4. Uses

• Cereal crops: wheat, rice, maize, barley

• Vegetables: tomatoes, lettuce, cabbage

• Fruit trees: citrus, apples, mangoes

• Industrial crops: cotton, sugarcane

• Turf and lawns: golf courses, gardens

• Hydroponic systems: in liquid form for nutrient solutions

5. Applications

• Soil application: broadcast, banding, or side-dressing of solid urea

• Foliar spraying: liquid urea solutions for rapid absorption

• Fertigation: dissolved urea-ammonium nitrate solutions applied via irrigation systems

• Blended fertilizers: mixed with phosphate or potassium fertilizers for NPK formulations