What is the difference in the size of urea particles

Urea currently sold on the market is divided into large particles and small particles. Generally speaking, urea with a particle diameter greater than 2 mm is called large-particle urea. So what are the similarities and differences between the application methods and fertilizer efficiency of large granular urea and small granular urea?

The difference between large and small granular urea is that their active ingredients are all water-soluble quick-acting nitrogen molecules, and the nitrogen content is both 46%. The difference is that the dissolution rate of large granular urea is slightly slower, so it is suitable for base fertilizer, but not for top dressing and flushing. Small granular urea is suitable for various soils and various crops. It is a nitrogen fertilizer with high nitrogen content and can be used as base fertilizer and top dressing. When applying small particles of urea as top dressing, it is best to apply it in strips or in acupuncture points. Try not to spread it. If it is not possible to apply in strips or in acupuncture points, spray it before and after light rain and when the soil is wet. Do not use too much when used as a green fertilizer, and apply enough when used as a tiller fertilizer and ear fertilizer. It also has a certain effect on increasing yield when used as extra-root topdressing. Small granular urea is suitable for foliar fertilization, and its concentration is generally 0.5% to 2%.

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