At present,our country chemical fertilizer's annual output had achieved 150 million tons, urea occupies above 1/5. After the urea applies into the soil, it can release out nitrogen which crops needs under the urine enzyme's action. But due to urea’s high solubility, and it is not easy to be absorbed by the crops, so the nitrogen releasing will drain along with the moisture in the soil; In addition, also a part of urea may adhere to the soil pellet surface layer so that difficult to be absorbed by the crops. Thus, causes the urea's effective availability generally is only about 30%.Therefore, the various countries was trying to find out the method to improve the utilization ratio of urea.
         In the late 1940s, the researcher discovered that the condensation product of urea and formaldehydeUrea Formaldehyde releases the ammonia obviously lower than Urea, and they have carried on the experiments in the American pasture, confirmed that the condensation has good fertilizer effectiveness. Therefore, many countries began to use it as a slow-release fertilizer and conduct experiment research. In recent years, according to the reports from Japan, Germany and so on, this condensation also had the functions of promoting soil to form the granular structure, guaranteeing the soil moisture, preventing desertification and increasing crops root system penetrating power. At the same time, it also has the environmental protection, resource saving, labor saving, etc. Using Urea Formaldehyde cannot cause crop burn and leaching loss, also it can gradually release most of the nitrogen throughout the entire growing season, the rest can be transferred to the next growing season. In addition, it also has the environmental protection, resource conservation, the advantages of labor saving.
         Compared with soluble fertilizer, Urea Formaldehyde itself consists of water soluble parts and water insoluble parts, it will release nitrogen in soil under moisture, urease, temperature, etc. Working together. Due to the release speed of nitrogen deponds on water insoluble parts, made it possible to control the release of fertilizer artificially. But Urea Formaldehyde release of nitrogen is relatively slow, thus Urea Formaldehyde is generally not used seperately, They always used in the compound fertilizer containing dissolved nitrogen sources of rapid release  and phosphorus, potassium. The fast release nitrogen supplies corresponding nutrient in early growing periods,and Urea Formaldehyde gives and effect to prolong the efficiency. he result of mixing dissolved nitrogen and Urea Formaldehyde is to obtain uniform the nitrogenous fertilizer, which can lengthen the releasing time, and pledge enough nitrogen for a long period.
         Urea Formaldehyde researched &developed by ourselves can accurately reach the release effect from 30 days to 180 days, and can be adjusted AI, WIN and HWIN according to the customers’ requirement of the release period, at the same time we refer to international quality testing standards to ensure that its quality reaches the international advanced level.

 The Urea Formaldehyde above supplies by granulated or the powdery. The granulated product's grain size range is 1-4mm, may directly mix with other fertilizers for use, the granular can prevent the dust, compare with other types of fertilizer, even if the granularity reduces, also cannot influence the release speed greatly. The powdery product 100% sieves through 60 mesh, suits very much on the fertilizer applicator, and can use in making granulation craft to obtain the complex fertilizer which contains difficult nutrient content.