The cabbage field should be based on the re-application of nitrogen fertilizer. The use of fertilizer should master the principle of “light before and then heavyâ€. The top dressing should be carried out in 2~3 times. The first top dressing should be in the early stage of the rosette, applying 10~15 kg of urea per mu. The potassium sulfate is 5~10 kg, and the new high-fat film 800 times liquid is sprayed to increase the utilization rate of the effective components of the nutrient. In the ball-forming period, ternary compound fertilizer is generally used, and the dosage per acre is about 50 kg, and the application is performed twice in the initial and middle stages of the ball. At the same time, it should be applied by foliar application. It can be sprayed with 0.3%~0.5% calcium chloride to apply 800 times liquid of new high-fat film. Once every 7 days, it can be controlled for 2~3 times in a row, and the application of micro-fertilizer can be applied. Boron is more sensitive, and the lack of boron fertilizer has a greater impact on yield. For boron-deficient soils, boron fertilizer should be applied. Boron fertilizer can be used as base fertilizer, 1 kg of borax per acre, mixed with other fertilizers, and applied to the soil. If the base fertilizer and boron fertilizer are insufficient, spray 0.1%~0.2% borax solution and 800 times liquid of new high fat film in the rosette agricultural technology period to the ball-forming period, spray once every 6~7 days for 2~3 times, and The timely application of strong stems in the growth period of Chinese cabbage can make the stems of the plants thick, the leaves are thick, the leaves are fresh and tender, the plants are flourishing, and the natural taste is strong. At the same time, it can improve the ability to resist disasters, reduce the amount of pesticides and fertilizers, and reduce residual poisons.
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The Network CCTV Wireless Security Camera
Compared with wired cameras, wireless security cameras are less invasive to your home, so they are easier and faster to set up. No need to drill through walls or ceilings. Wireless cameras are also more flexible than wired systems because they are not as constrained as wired systems.
The biggest disadvantage of a wireless Camera System is that it is completely dependent on the strength of your Wi-Fi connection. Any interruption or weak signal can mean that you may lose connection to the system, resulting in the loss of the film, which can be critical
Best wireless outdoor security camera overall Ring Floodlight Cam Wired Plus.
Best wireless outdoor security camera: Fuvision 4G PTZ WiFi Camera
Best outdoor security camera : 4g Outdoor Wireless Camera
Working principle of camera
The working principle of the camera is to reflect the light to the sensor, convert the signal captured by the sensor into a digital signal, and finally send it to the computer to display the image. Then the camera can capture the static and dynamic images in the picture.
The sensor of the camera is the most important part. It can capture light and convert it into electrical signals. There are many types of sensors, the most common are CCD and CMOS sensors, which can be used to capture images.
The internal circuit of the camera will convert the signal captured by the sensor into a digital signal and send it to the computer. The computer uses these signals to display images, or it can save images to the hard disk drive.
If the camera is not connected to the network, it will not be able to achieve real-time monitoring, but the camera will still work and save the pictures and videos taken. If we need to view, we can only remove the memory for viewing.
The smart camera can also support remote monitoring. You can remotely view the real-time image of the camera through your mobile phone or computer. Users can view the image of the camera anytime, anywhere, to better protect the security of your home or office.
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