
Molecular formula: CH4N₂O+ NH4NO3+ H₂O
Surface Application UAN Liquid Spraying Directly On Soil or Plants
Surface Application UAN Liquid Spraying Directly On Soil or Plants, also called UAN (urea ammonium nitrate). It is a liquid fertilizer solution that contains 28% nitrogen. It is a versatile and cost-effective fertilizer that can be applied through different methods, including surface application. Surface application of UAN involves spraying the liquid directly onto the soil or plant foliage. In this blog post, we will explore the benefits and considerations of surface application of UAN liquid.
Considerations for Surface Application
1. Weather Conditions: The weather conditions can impact the effectiveness of surface application of UAN. Rain can wash away the liquid before it is absorbed by plants or soil, reducing nutrient uptake. Additionally, high temperatures and low humidity can increase the risk of leaf burn if UAN is applied directly onto plant foliage.
2. Soil Type: Surface application of UAN can be less effective on sandy soils. The liquid fertilizer can move quickly through the soil, reducing the amount of nutrient uptake by plants.
3. Concentration: The concentration of UAN solution is an important consideration for surface application. Dilute solutions can be used for foliar application, while concentrated solutions are more suitable for soil application.
In conclusion, surface application of UAN liquid provides a quick and efficient method for delivering essential nutrients to plants. It is a cost-effective and user-friendly method that can deliver favourable results for plant growth and yield. However, proper consideration must be given to the weather conditions, soil type and the concentration of the solution to ensure optimum results.
Specification
|
Technical Specification |
Standard |
Test Result |
|
Appearance |
Liquid |
Liquid |
|
Total nitrogen |
28-32% |
32% |
|
NO3 |
6.8-7.75% |
7.73 |
|
NH4 |
6.8-7.75% |
7.75 |
|
Urea Nitrogen |
14-17% |
16.8 |
|
PH value |
5.5—7.5 |
6.5 |
Package:
25kg or 20L, PVC bucket. 1T or 1000L, IBC ton barrels

Storage Tank Materials
UAN is corrosive, especially due to its ammonium nitrate content. Therefore, it’s important to store it in materials that can resist corrosion. Suitable materials include:
Stainless Steel: This is the best material for long-term storage because it is highly resistant to corrosion.
Polyethylene or Fiberglass Tanks: These are often used because they are non-corrosive, lightweight, and easier to install.
Carbon Steel (with coatings): If carbon steel is used, it should be lined or coated with a corrosion-resistant material, as it can corrode over time when exposed to UAN.
Aluminum and Copper should be avoided, as they corrode rapidly when in contact with UAN.
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