Three Principles of Mixed Fertilizer Application
Some large growers like to use their own mixed fertilizers, but often encounter unpredictable problems during mixing. The three principles of mixed application of simple fertilizers can help farmers overcome the technical barriers related to fertilizer application.
Principle 1: The smaller the hygroscopicity and caking after mixing, the better
Hygroscopicity and caking, hygroscopicity refers to the ability of chemical fertilizers to absorb moisture in the air. The agglomeration is related to the hygroscopicity of the surface of the single-element fertilizer particles, and the fertilizer having a large hygroscopicity is easy to agglomerate. These two properties are very unfavorable for the storage, transportation and application of chemical fertilizers. The principle of mixed application of fertilizers requires that the smaller the hygroscopicity and the caking property, the better.
Measured by the moisture absorption point at room temperature, the hygroscopicity of the low moisture absorption point is large, and the fertilizer is easily deliquescence. The hygroscopicity of the fertilizer after mixing is significantly greater than that of the simple substance, and it is more prone to deliquescence.
Principle II:
Select chemically compatible simple fertilizers for mixed application
Mixing between different fertilizers often produces some chemical reactions. Some of these reactions can lead to increased hygroscopicity and agglomeration or effective nutrient fixation to reduce the effect of fertilizer. Chemically compatible single fertilizers are selected for mixed application. If two non-mixable single fertilizers are blended together, it will generate heat, increase humidity, evolve gas or agglomerate. For example, a combination of calcium sulphate and calcium carbonate results in the loss of ammonia. 2 Ammonium nitrate and urea are two kinds of simple fertilizers that are completely incompatible. If they are mixed and stacked, their hygroscopicity will be greatly enhanced, resulting in a relatively dry In the environment, the mixed materials are also susceptible to moisture absorption, and even appear to be dissolved and cannot be used. 3 Urea and superphosphate are two types of fertilizers that are limited in nature and can be mixed and used without storage. In the compound fertilizer processing plant, the free acid in the superphosphate is neutralized with ammonium to form an aminated superphosphate, which can be mixed with urea.
Principle 3:
The proportion of mixed fertilizer should be well controlled
In the common simple nitrogen fertilizers and phosphate fertilizers, calcium superphosphate and ammonium sulfate have good physical properties and can be directly used as seed fertilizers or basal fertilizers; while superphosphate and ammonium bicarbonate are finitely compatible, and the two must be mixed in a certain proportion. , and with the mix as a base fertilizer, can not be stored. The optimal ratio of the two: superphosphate:ammonium bicarbonate is approximately equal to 7:3; if too much ammonium bicarbonate can easily reduce the proportion of water-soluble phosphorus in the superphosphate. Phosphate fertilizer can be used as a base fertilizer once into the soil, and less ammonium bicarbonate can just leave part of the dressing for later use. In addition, the particle size of the fertilizer to be blended should be controlled. Only the fertilizer with a matching particle size can achieve uniform fertilization and the fertilizer effect can be guaranteed.
The Network Video Recorder 4K, also called the NVR 4K/ 4K HD NVR/ 4K NVR Kit/ NVR 4K CCTV/ NVR 4K System, means that this DVR has the resolution of 4K, 4096x2160, about 8.8 million pixels, which can achieve the movie level image quality, which is equal to more than four times the current top level 1080p resolution. As for 4K, the data volume of each frame has reached 50MB, so both the decoding playback and the editing require the top level configuration machines which also means the ultra-high-definition resolution and the high price.
So what is the Frame?
The Frame is the smallest unit of the single image in video/animation, which is equivalent to every frame of lens of a film. A frame is a still picture, and successive frames form an animation, such as a TV animation. We usually call the Frame the number of frames that pictures transmitted in 1 second. We can also be regard the Frame as that how many times the graphics processor can refresh per second, which is usually expressed by fps (Frames Per Second), and it can be called the Frame Rate. Each frame is a still image, and the displaying frames in the rapid succession creates an illusion of motion. The high frame rate can achieve smoother and more realistic animation. The more frames per second (fps) there are, the smoother the displayed motion will be.
So what is the Frame Rate?
The Frame Rate, also be called the frame frequency, is expressed in Hertz (Hz) and it is the frequency (rate) of the bitmap images(whose unit is frame) that continuously appear on the display. This term also applies to the films, the video cameras, and the computer graphics and motion capture systems.
What about the relationship between the Frame Rate and the Human Vision?
The time sensitivity and resolution of human vision vary, according to the types and characteristics of visual stimuli, and differ between individuals. The human vision system can process 10 to 12 images per second and perceive them individually, and the higher Frame Rates are considered the motions.
Generally speaking, when the Frame Rate is higher than 50 Hz to 90 Hz, most research participants believe that the modulated light (such as a computer monitor) is stable, and the sense of stability of this modulated light is called the flicker fusion threshold( when the modulated light is non-uniform and contains an image, the flicker fusion threshold can be much higher, perhaps hundreds of hertz). As for the image recognition, it has been found that if people need to recognize the specific images in an uninterrupted series of different images, each image should last 13 milliseconds at least. And the persistence of the human vision sometimes may cause a very short single millisecond visual stimulus, and the duration will be from 100 milliseconds to 400 milliseconds. Very short multiple stimuli are sometimes considered as a single stimulus. For example, a 10-millisecond green flash first, then a 10-millisecond red flash followed, under this condition, the they would be perceived as a single yellow flash.
Well, I hope that my introduction about the Network Video Recorder 4K and the Frame Fate could help you know more about this video monitoring field.
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