• Joseph Molnar

  almost 6 years ago

  About urea foliar application is told that agricultural breeded plants can use the nitrogen ad hoc and efficiently. But urea is ambivaltent : it is causing also leaf burning by not proper application in small ranged climatic environment conditions. University of Minnesota says: Fluid urea Uniformity of particle size is important with dry solid urea, whether applied directly or in blended formulations. Some imported urea appears to be below U.S. quality standards on granule uniformity. Dissolving urea and marketing the liquid solution is an attempt to overcome this lack of uniformity and still take advantage of the favorable urea price. The liquid mix of urea and ammonium nitrate (UAN 28% N) has been on the market for a long time. The characteristics of this solution, however, are not the same as when urea alone is dissolved in water. A solution of 50% urea by weight results in 23-0-0 and has a salting-out temperature of 60 degrees F. In order to store and handle liquid urea during cooler temperatures, the nitrogen concentration must be lowered to reduce salting problems. There are several possible formulations that can be used for this, such as adding small amounts of ammonium nitrate, ammonium sulfate, or anhydrous ammonia. Research, particularly on liquid urea, is very limited. Generally, where dry urea functions successfully, the fluid urea should perform equally well and may have the advantage of better uniformity over some dry urea sources.
• Joseph Molnar

  almost 6 years ago

  http://www.aboutuganda.com/uganda/agriculture/chemicals-fertilizers is a list of dealers Your are better off just buying the dry urea and mixing it yourself. There are some advantages to foliar application with spray, but the research is not strong.

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