In winter crops, cruciferous crops account for a large proportion, such as cabbage, cabbage, radish, and rapeseed. These crops are particularly sensitive to boron. At the same time, celery, wheat, carrots, etc. are also more sensitive to boron. Boron deficiency is not only seriously affected reproductive growth, but also blocked vegetative growth, decreased cold resistance, but also easy to induce heart rot. How do you add boron? The application method is as follows:
Basal fertilizer: Boron fertilizer has the best effect on medium or severe boron-deficient soil; 0.5-0.75 kg borax can be used per acre to mix with dry fine soil or organic fertilizer, and then ditch can be applied or applied; or with nitrogen. , Phosphorus, potassium and other fertilizers are mixed together and applied together. Do not make the boron fertilizer directly contact the seeds (live) or seedlings (transplanting), so as to avoid affecting the growth of germination, emergence, and young roots and seedlings; it is not suitable for deep turning or spreading. The amount should not be too large; if the application of borax per acre more than 2.5 kg, it will reduce the emergence rate, or even die seed production.
Treatment seed: borax or boric acid is preferred for soaking. Usually borax is first dissolved in hot water at 40°C, then diluted with cold water to 0.01%~0.03% borax or boric acid solution. The seed is poured into the solution and soaked for 6~8 hours. The seed and liquid ratio is 1:1, and the seeds can be sown after drying out.
Foliar spraying: Use 0.1%~0.25% borax or boric acid solution, spraying 40~80kg solution per acre, 6~7days, spray 2~3 times; foliar spray in the afternoon Well, it is advisable to spray fog over the leaves; if it rains within 6 hours after spraying, it should be sprayed again.
4G Mini Camera Structural components
The main structures and components of the camera can be listed from the working principle of the camera:
1. LENS
Lens structure, consisting of several lenses, including plastic lens or glass lens
2. Image sensor
It can be divided into two categories:
CCD (charge couple device): charge coupled device
CMOS (complementary metal oxide semiconductor): complementary metal oxide semiconductor
3. Digital signal processing chip (DSP)
There are many DSP manufacturers, such as VIMICRO 301P/L, SONIX 102/120/128, ST (Logitech LOGITECH's DSP provider), SUNPLUS (SUN+focuses on the development of CIF and VGA for single chip, but the image quality is average), PIXART (original phase), PAC207, SQ930C, etc.
4. Power supply
Two working voltages are required inside the camera: 3.3V and 2.5V. The latest process chip can use 1.8V.
Some cameras also use video transmission lines for synchronous power supply without external power lines.
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