Skillful application of urea, "one, two, three, and no"

One is suitable for top dressing. Urea is a neutral fertilizer, less damage to crop leaves, but also easy to dissolve in water, strong diffusion, easy to be absorbed by the leaves, after entering the leaves is not easy to cause the phenomenon of plasmolysis, it is very suitable for extra-root fertilizer. However, urea with a biuret content of not more than 2% should be used to prevent damage to the leaves. The concentration of urea as the topdressing fertilizer varies depending on the type of crop. The concentration of top dressing fertilizer outside the crop is 1.5%~2%; the concentration of dressing outside the roots of the dicotyledonous crop is 1%, and the concentration during the flowering phase of the crop Should also be 0.3% ~ 0.5% is appropriate. In general, the amount of fertilizer applied outside the urea root per 667 square meters is 0.5 to 1.5 kg. The spraying time is suitable after 4 pm, when the evapotranspiration is small, the leaf pores gradually open, and the diluted urea solution can be absorbed completely at one night, which greatly improves the utilization rate of urea.
The second is to apply early and deep. One must apply early. Urea must be applied to the soil to have a conversion process that can be absorbed and utilized by crops. Therefore, if urea is applied for the same time as other nitrogen fertilizers, the maximum effect period of crops on nitrogen nutrient absorption will be delayed. Therefore, the application period with topdressing fertilizer with urea should be 3~5 days ahead of normal nitrogen fertilizer to receive better results. The second is to deepen. Urea, whether it is basal or topdressing, should be deeply buried. Deep application can control the rate of hydrolysis of urea, so that it can evenly release nitrogen nutrition, prevent and control the loss of nitrogen volatilization, and improve the utilization rate. Practice has proved that when urea is applied on the ground surface for 4 to 5 days at room temperature, most of the nitrogen will be volatilized by ammoniating, and its utilization rate is only about 30%, especially on the surface of calcareous and alkaline soils. Volatile losses are even more severe. Therefore, when urea is used to top-dress dry field crops, it is better to grind the pits or deepen the ditch for less than 10 cm, so that the urea can be located in the moist soil, which is conducive to the conversion of urea. Due to the high nitrogen content of urea and the high concentration of nutrients, it has great hygroscopicity. Therefore, when topdressing, it is necessary to prevent urea from being applied near the roots of crops, and it is even more important not to drop urea into the heart of the crop so as not to burn the seedlings and affect their growth.
Thirdly, it is not suitable to apply water, dip seed and apply water immediately after application. First, it is inappropriate to express. In particular, saline land is less suitable for spreading on the surface. This is because ammonium carbonate, ammonium bicarbonate, and ammonium hydroxide are all unstable compounds produced after decomposition of urea. According to an experimental investigation, the application of urea on a slightly alkaline or neutral soil surface has a nitrogen loss of about 20% to 40%. Even on acidic soils, it will inevitably cause losses. The second is not suitable for dipping and seed dressing. Urea contains a small amount of biuret, which is toxic to crops. Immersing and mixing seeds with urea can destroy the protein structure of the seed and denature the protein, affecting seed germination and root growth of seedlings. Third, it is not suitable to apply water immediately after application. After the urea is applied to the soil, it is dissolved in the soil solution in a molecular state before it is converted into ammonium bicarbonate, and it is not easily adsorbed by the soil. If irrigation is performed immediately, the fertilizer will be lost along with the water, and irrigation will be performed every several days after the application.

Pain Relief Patch
[Name] Medical Cold Patch
[Package Dimension] 6cm×8cm 4pieces/box
The pain relief patch is composed of three layers, namely, backing lining, middle gel and protective film. It is free from pharmacological, immunological or metabolic ingredients.
[Scope of Application]
For cold physiotherapy, closed soft tissue only.
The patches give fast acting pain relief for strains, sprains, cramp, bruises, swollen areas or joint stiffness.
[How To Use a Patch]
Please follow the Schematic Diagram. One piece, one time.
The curing effect of each piece can last for 6-8 hours.
Do not apply the patch on the problematic skin, such as wounds, eczema, dermatitis,or in the eyes. People allergic to herbs and the pregnant are advised not to use the medication. If swelling or irritation occurs, please stop using and if any of these effects persist or worsen.notify your doctor or pharmacist promptly. Children using the patch must be supervised by adults.
[Storage Conditions]
 Store below 30c in a dry place away from heat and direct sunlight.

Pain Relief Patch(Pain Areas)

Pain Relief Patch(Pain Areas),Shouler Pain Relief Patch,Joints Pain Relief Patch, Muscle Pain Relief Patch

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