The main measures to control wheat seedlings: First, lay the foundation for sowing. To re-apply organic fertilizer, vigorously promote the return of straw to the field, effectively increase soil organic matter content and improve the soil aggregate structure. Fertilizer application NPK fertilization should be deeply ploughed to achieve the "deep, clean, fine, solid, flat" standard. The second is to strictly sow the plant. Early or late sowing can cause poor growth of wheat. The third is precision metering. According to different levels of fertility, different periods, different species to achieve a reasonable dense planting, completely change the habit of blind large broadcast volume. The fourth is to delay the sowing date. In case of warm winter weather, according to weather forecast, it can be broadcasted 3-5 days later. Http://
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1. Solar panel: The solar panel is an important part of the mobile phone software of the solar power generation system, and also a part of the practical value of the mobile phone software of the solar power generation system. Its function is to convert the professional ability of radioactive substances in natural light into electric energy, or send them to storage batteries, or promote load work.
2. Solar controller: The solar controller is used to control the operation of mobile phone software in all systems, and has the functions of overcharge protection and overcharge maintenance for the battery. In areas with large temperature difference, the qualified controller shall also have the function of temperature compensation. In the mobile phone software of the solar road lamp system, there must be light control switch and time control solar road lamp operation.
3. Battery: generally valve controlled maintenance free lead-acid battery. In the mobile phone software of small and medium-sized systems, in cold weather areas, a solar gel battery needs to be configured, which can be used at low temperatures, with high efficiency and is not vulnerable to major damage. Its function is to store the electric energy of the solar panel when the sun shines, and then release it under certain conditions.
4. Variable frequency power supply: split wave type and sine wave type. In order to provide power for 220VAC electrical products, it is necessary to convert the DC stabilized voltage power supply in the solar power generation system software into AC circuit energy, so DC AC variable frequency power supply is required.