Urea (46-0-0) Calculator & Dosage Guide

Urea is the most concentrated solid nitrogen fertilizer, widely used in agriculture and turf applications for fast, economic green-up and vegetative growth.

Nitrogen46N
Phosphate0P₂O₅
Potash0K₂O
Solubility:1079 g/L
Standard Temp:20°C

Pre-configured Urea Calculator

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Calculated Recipe Output

Configure your targets and click "Run Analysis" to generate your fertilizer recipe.

1. What is Urea?

Urea is a high-grade chemical source supplying essential plant nutrients. The standard NPK ratio of this fertilizer is 46-0-0, which signifies that it contains 46% Nitrogen (N), 0% Phosphorus as P₂O₅, and 0% Potassium as K₂O by total product weight. Under agronomic standards, the phosphorus and potassium components are expressed in their oxide forms rather than elemental phosphorus and potassium.

When dissolved in water, this fertilizer dissociates into plant-available ionic nutrients. This allows roots to absorb them instantly via active transport. Understanding the exact composition prevents chemical lockouts and guarantees optimal nutrient concentrations.

2. Best Used For

This fertilizer is highly effective when applied to crops and systems requiring quick, specific nutrient supply:

  • Turf Grass
  • Wheat
  • Maize (Corn)
  • Sugarcane
  • Rice

3. Solubility & Mixing Instructions

At a standard temperature of 20°C, the maximum solubility limit of Urea is 1079 grams per liter of water. Attempting to mix at concentrations above this threshold will result in precipitation, leaving undissolved particles at the bottom of your reservoir or mixing tank.

Step-by-Step Dissolution Method

  1. Fill your clean mixing vessel or reservoir with 70% of the total target water volume.
  2. Using a digital scale with at least 0.1g precision, weigh out the required amount of Urea calculated above.
  3. Gradually pour the dry fertilizer granules into the water while continuously agitating or stirring.
  4. Stir until the crystals are completely dissolved, then top off the vessel with water to reach the final 100L volume.
  5. Measure the Electrical Conductivity (EC) or Total Dissolved Solids (TDS) using a calibrated meter to verify target ppm.

4. Chemical Compatibility & Warnings

To prevent chemical reactions that render nutrients unavailable to plants, observe the following compatibility constraints:

Avoid mixing with highly acidic fertilizers in concentrate to prevent heat generation.

Do not apply on wet leaves to avoid burning.

Avoid application in direct sunlight or dry soils to reduce nitrogen volatilization loss.

5. Related Fertilizers

Compare or blend Urea with other high-grade fertilizer materials to complete your custom recipe: