Urea

Urea is a kind of high concentration nitrogen fertilizer, which is a kind of neutral quick-acting fertilizer, and can also be used to produce many kinds of compound fertilizers. No harmful substances remain in the soil, long-term application of no adverse effects. Urea is used as a base fertilizer, or as a top dressing, and sometimes as a seed fertilizer also. Urea before conversion is molecular state, it can not be adsorbed by soil, it should prevent loss with water. When urea is applied to the soil, a small amount of the urea is dissolved in the soil solution in molecular form and adsorbed by the soil through hydrogen bonding. 

There are two specifications of granular urea, with small particles having a diameter of about 1.5 millimeters and large particles having a diameter of about 2.0-4.75 millimeters. Please let us know which specification you require.

Controlled release urea fertilizer is a type of urea fertilizer that maintains a longer fertilizer efficiency due to slow release of effective nitrogen caused by changes in chemical composition or surface coating with semi permeable or impermeable substances. The advantage is that after one application, it can meet the nutrient needs of crops for a period of time to adapt to their growth patterns. The main varieties include formaldehyde fertilizers, sulfur coated urea, etc.