Three principles of mixed fertilizer application

Some large growers in the Northeast have liked to apply their own mixed fertilizers in recent years, but they often encounter various unpredictable problems during the mixed application process, and they are confused because they are not handled well. In order to help farmers overcome the technical obstacles related to the mixed application of fertilizers, this newspaper specially invites experts to introduce the three principles of common single-fertilizer mixed application for farmers' reference.

The most important problem encountered with mixed fertilizers in mixed application is the defects from their physical properties, resulting in inconveniences in storage, transportation and field application. For example, agglomeration, dust, secondary separation of particles and water absorption are too large. Therefore, growers need to understand the physical properties of common nitrogen, phosphorus and potassium fertilizers, especially hygroscopicity, agglomeration and particle size, and pressure resistance.

Hygroscopicity and agglomerate hygroscopicity are the ability of a fertilizer to absorb moisture from the air. The agglomeration is related to the hygroscopicity of the surface of the simple fertilizer granules, and the fertilizer with high hygroscopicity is easy to agglomerate. These two properties are very unfavorable for the storage, transportation and application of fertilizers. The principle of fertilizer application requires that the hygroscopicity and agglomeration of the mixture be as small as possible. However, most water-soluble fertilizers absorb water in the air more or less, but there are great differences between different varieties. As measured by the moisture absorption point at normal temperature, the moisture absorption point is low and the moisture absorption is large, and the fertilizer is easily deliquescent. Among the common chemical fertilizers, calcium nitrate and ammonium nitrate are the lowest (42.7%, 66.5%); ammonium chloride, urea and potassium chloride are medium (79%, 82%, 84%); ammonium sulfate, superphosphate, Potassium sulfate is higher (86%, 91%, 95%). The above data is the hygroscopic point of the simple fertilizer. When the fertilizer is mixed, the hygroscopicity is more obvious than that of the simple substance, and it is easier to absorb water and deliquesce.

Consistency between different fertilizers There are often some chemical reactions in the mixing of two or more elemental fertilizers. Some of these reactions are benign, and some may result in increased hygroscopicity and agglomeration or effective nutrient fixation to reduce fertilizer efficiency. Therefore, a chemically compatible elemental fertilizer should be selected for mixed application. If two unsuitable single fertilizers are blended together, heat, humidity, gas evolution or agglomeration will occur. For example, the mixing of 1 calcium and calcium carbonate leads to the loss of ammonia; 2 ammonium nitrate and urea are completely incompatible two kinds of simple fertilizers, if they are mixed and stacked, the hygroscopicity after mixing is greatly enhanced, resulting in drier In the environment, the mixture is also very easy to absorb moisture, and even dissolves and cannot be applied. 3 Urea and superphosphate are two kinds of fertilizers that are mixed in a limited way. They can be mixed and used, and cannot be stored. Especially in the summer high temperature and high humidity season, the soil can not be waited overnight after being mixed into the soil. If the two are mixed overnight, the mixture will slowly deliquesce and become a paste. In the compound fertilizer processing plant, the free acid in the superphosphate is neutralized with ammonium to form ammoniated superphosphate, which can be mixed with urea.

The answer to whether the common single fertilizer can be mixed is listed in the (left) table. The relevant information can be found from the table. In the common elemental nitrogen fertilizer and phosphate fertilizer, the material properties are good when mixed with superphosphate and ammonium sulfate. It is used directly as a seed fertilizer or base fertilizer; while superphosphate and ammonium bicarbonate are of limited binding type, they must be mixed in a certain proportion and used as a base fertilizer with the mixture and cannot be stored. The optimum ratio of the two is that superphosphate:ammonium hydrogencarbonate is approximately equal to 7:3; if the ammonium carbamate is too much, the proportion of water-soluble phosphorus in the superphosphate is easily lowered. More phosphate fertilizer can be applied to the soil as a base fertilizer at one time, while less ammonium carbonate can be reserved for later fertilizer application.

Matching of different granular fertilizers When several granular fertilizers are mixed and applied, stratification may occur during storage, transportation and application, resulting in uneven fertilization and poor fertilizer efficiency. The delamination problem is related to the uneven size of different fertilizer particles. Therefore, the particle size of the fertilizer to be mixed should be controlled, and only the mixed fertilizer with the same particle size can achieve uniform fertilization, and the fertilizer efficiency can be guaranteed.

Antique Shower Faucet in use function, as with the general Shower Faucet. The main features of the archaize faucet are the appearance advantages, and the appearance and decoration show a retro performance at any time. Not only has the antique flavor, but also revealed a noble and elegant. The retro design that incorporates the entire bathroom highlights the flavour of the times. Because of the outstanding decorative effect of the antique shower faucet, it is well liked by people, but the advantages of the Antique Faucet with different materials are different, and the effect of natural decoration is different.

Shower Faucet

Antique Shower Faucet,Brass Shower Faucet,Bathroom Antique Shower Faucet,Antique Mixer Shower Faucet

KaiPing Dongsheng Sanitary Ware Industrial Co.,Ltd. , http://www.dsfaucet.com