What is urea Urea is a compound produced from a chemical formula of carbon dioxide and ammonia. Product Specifications.
The substance is adaptable for various crops and features a high nitrogen content that encourages plant growth. Feed-grade urea can also provide protein to livestock as an ingredient in cattle feed.
Coatings and Construction : Urea is present in adhesives, plastics, resins, inks, pharmaceuticals and the finishes for textiles, paper and metals. Other : More recently, urea has been used to reduce air pollution from diesel engines. These engines produce high concentrations of the pollutant nitric oxide, which can be removed if it reacts with ammonia.
However, since ammonia is unsafe to handle alone, a solution of urea can be dissolved in water and injected into the exhaust's gases. It will safely decompose to carbon dioxide and ammonia, thus reducing the nitric oxide pollutant to nitrogen.
Quick Answers. What is urea? Where can I buy urea? How can I buy urea? What package sizes are available for urea? Usually it's just a few days before plants can effectively use the nitrogen. Although urea imparts an alkaline reaction when first applied to the soil, the net effect is to produce an acid reaction.
Urea or materials containing urea should, in general, be broadcast and immediately incorporated into the soil. If applying urea-based fertilizer in a band, separate it from the seed by at least 2 inches of soil.
Under no circumstances should urea or urea-based fertilizer be seed-placed with corn. With small grains, you can generally apply 10 pounds of nitrogen as urea with the grain drill at seeding time, even under dry conditions. Under good moisture conditions, you can apply 20 pounds of nitrogen as urea with the grain drill. Research from North Dakota State University indicates that, under dry conditions, urea can reduce wheat stands more than 50 percent Table 5. This was for urea applied with a grain drill in a 6-inch spacing, at the rate of more than 20 pounds of nitrogen per acre.
University of Wisconsin research indicates that seed-placed urea with corn, even at low rates of nitrogen, is very toxic to the seed and greatly reduces yields Table 6. However, when urea was side-placed as a 2-byinch starter, researchers noted little, if any, damage Table 7.
In Minnesota, good crop production usually requires an application of more than 20 pounds of nitrogen per acre. Farmers can avoid damage from urea by broadcasting most of the urea nitrogen fertilizer ahead of seeding. Data in Table 8 indicate that urea broadcast prior to seeding is equal to or more effective than similar ammonium nitrate treatments. Urea can be bulk-spread, either alone or blended with most other fertilizers.
This lack of weight produces a shorter distance-of-throw when applying the fertilizer with spinner-type equipment. In extreme cases, this will result in uneven crop growth and wavy or streaky fields. Urea and fertilizers containing urea can be blended quite readily with monoammonium phosphate or diammonium phosphate Do not blend urea with superphosphates unless applied shortly after mixing.
Particle size uniformity is important with dry solid urea, whether applied directly or in blended formulations.
Some imported urea appears to be below U. Dissolving urea and marketing the liquid solution is an attempt to overcome this lack of uniformity while taking advantage of the favorable urea price. The liquid mix of urea and ammonium nitrate UAN 28 percent N has been on the market for a long time.
A solution of 50 percent urea by weight results in and has a salting-out temperature of 60 degrees Fahrenheit. To store and handle liquid urea during cooler temperatures, the nitrogen concentration must be lowered to reduce salting problems. Several possible formulations 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 successfully functions, the fluid urea should perform equally well and may have the advantage of better uniformity over some dry urea sources.
Most U. Biuret content is typically around 0. High heat is normal during urea manufacturing. No such conversion happens in storage or in the soil. Biuret converts to ammonia, but conversion is much slower than for urea. Urea can be applied to sod crops, winter wheat or other small grains. However, make this application in cool seasons.
During warm periods 60 degrees Fahrenheit or above , urea in contact with vegetative material tends to give off ammonia. You can also apply urea as a foliar spray on some crops, such as potatoes, wheat, vegetables and soybeans. Urea is highly water soluble. At normal atmospheric temperatures, approximately 1 pound of urea can be dissolved in 1 pound of water. Research indicates that urea should contain no more than 0.
Under normal circumstances, it can be safely stored with no loss of quality. Urea particles are generally soft and abrasion can break the granules. It can also be synthesized artificially. The compound is solid, white, and odorless, and it is sold in either crystal or pellet form. Feed-grade urea used for cattle feed has a slightly different chemical formula from traditional carbamide. The feed-grade compound generally has a higher biuret content, lower moisture content, and a lower pH.
It features a solid white prill and a round, even shape. Feed-grade urea is produced via the synthesis of nitrogen and natural gas found in the atmosphere, while traditional urea is created naturally or synthetically. Urea, also known as carbamide or urea n46, is the most regularly used nitrogen fertilizer in the world.
Numerous agricultural and polymer applications employ this additive, and it can effectively reduce automotive-related air pollutants. More than one million pounds of urea are produced every year in the United States alone. If you are a urea supplier in North America, choose Brenntag as the distributor you need for your carbamide and similar products.
Brenntag offers an extensive range of raw materials to meet the needs of nearly any market. You will find more than 10, products supplied by an industry-leading supplier base, offering a holistic solution for your chemical and ingredient needs. Buy urea online. This document is for informational purposes only.
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