1. The sowing period and varieties are selected from early February to late April in batches, live broadcast or transplanted, and marketed as seedlings (commonly known as Fessola or Chinese cabbage). Sowing before the end of March should choose late-maturing varieties, such as April slow. After sowing in late March, choose early-maturing varieties, such as Gaojiaobai, Xiaojiaobai, etc., to sow 1.2 to 1.5 kilograms of seeds per acre. 2. Choose a loose and fertile soil with no three wastes pollution, no excessive pesticide residues and toxic heavy metals, and adopt narrow and deep furrow cultivation, the border width is 1.5 meters, and the border surface is required to be flat. Apply more old rotten ash and soil mixed fertilizers to increase soil temperature. 3. Sowing and planting Spring cabbage is mostly marketed as seedlings, some of which are planted. Apply 40%-50% decomposed human and animal manure after sowing, and then decide to water according to the weather and the dryness and wetness of the border surface. When planting seedlings, the seedling age is 15-25 days, the row spacing is 16 cm, and the plant spacing is 6-10 cm. Intercropping with melons and legumes. 4. Cultivation and top dressing are rainy in spring and the soil is easy to compact. The ditch should be cleared and drained in time to prevent water from the soil area and lower the groundwater level. For transplanted seedlings, timely shallow field cultivation is required to remove weeds in the field. After the planting is alive, topdressing manure is applied every 3 to 4 days. If the soil is dry on a sunny day, the frequency of topdressing should be frequent and the concentration should be small; after the rain, the soil should be wet, the frequency of topdressing should be reduced, and the concentration can be appropriately increased. Before the live seedlings go on the market, you only need to topdress the mature manure 1-2 times on sunny days after emergence. Pay attention to stop the application of manure water more than 7 days before harvest, and change to water or apply a small amount of urea or ammonium bicarbonate according to the weather and lack of fertilizer. 5. Cultivation of spring cabbage in a greenhouse can be intercropped with melons and legumes in a greenhouse, which can keep warm and avoid frost or cold, which is beneficial to shorten the growth period, and improve the quality of the market. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone
Does the solar PTZ Camera System Kits work well
(3) Solar energy resources in various regions are not available, so photovoltaic power generation is highly regional.
we offered that you can trust. Welcome to do business with us.
PTZ Camera System Kits,PoE NVR,Day Night Motion NVR Sets,wireless camera to NVR,Reolink WiFi cameras Shenzhen Fuvision Electronics Co., Ltd. , https://www.outdoorsolarcameras.com
Monitoring without network means that mobile phones and cameras can only be seen within a certain range of 5~10 meters.
Therefore, no network and no power is just a gimmick. We must pay attention to distinguish when buying.
Is the Solar Camera easy to use
Jiajie intelligent surveillance camera is very good
Advantages and disadvantages of solar monitoring
Probably.
Generally, offline display has the following two conditions.
One is that the installed 4G card has no traffic and cannot provide network connection for monitoring;
The other is that there is a problem with the signal receiving device, which makes it unable to connect to the network. Therefore, the user can access the APP connected to the monitor to check whether there is still traffic on the 4G card. If there is still traffic, there is a problem with the monitoring; If there is no traffic, the renewal fee can continue to be used.
Which is the best solar Outdoor Camera
It may be that the poor contact of the power plug causes power on, heating and power failure, or it may be that the camera's internal control motherboard fails, causing power on for several minutes and automatic power off protection.
The camera works continuously, and the internal chip may overheat, which also exists in many SLR cameras. Some cameras impose time limits on continuous shooting. Centralized power supply with high-power switching power supply
Disadvantages of camera solar power supply
The main advantages of solar photovoltaic power generation are:
(1) Simple structure, small and light volume;
(2) Easy to install, easy to transport, short construction period, and short time to obtain energy;
(3) It is easy to use and maintain, and can work normally in the temperature range of - 50 ℃~- 65 ℃;
(4) Safe, reliable, noiseless, pollution-free, and absolutely clean (pollution-free);
(5) The advantages of building roofs can be used without the restriction of resource distribution regions; For example, areas without electricity and areas with complex terrain;
(6) The rate of price reduction is fast, and the time for energy repayment may be shortened;
(7) It can be matched with the battery to form an independent power supply, or it can be connected to the grid for power generation.
(8) Local power generation and supply without fuel consumption and transmission lines
The main disadvantages of solar photovoltaic power generation are:
(1) Low solar energy density and large coverage area;
(2) Photovoltaic power generation is intermittent and random;