Using newspapers, television, and the Internet to obtain accurate information to guide and influence our planting intentions is undoubtedly correct, but any information is limited and regional. People are optimistic about a certain kind of vegetable and they can make money, but sometimes you can't make money by planting it. Therefore, I believe that the use of information should also be adapted to local conditions and vary from person to person. Specifically, the following factors should be comprehensively considered:
Own seed management ability
Vegetables are broadly divided into two major categories. One is leafy vegetables and the other is fruit and vegetables. The cultivation of leafy vegetables has the characteristics of low investment, easy management, and short growth cycle; the cultivation of fruits and vegetables is relatively costly and has a long growth cycle, and requires high seedling management skills and experience. You should choose the vegetables you are good at planting according to the level of your own seed, and choose the vegetables that you have a good grasp of.
Your own sales ability
Before the vegetable seeds are landed, the sales channels for the vegetables should be considered first, whether they are agricultural super-butt joints or market transactions or land sales. When you fully understand the characteristics of the vegetables you are dealing with in the market, arrange vegetable varieties that are marketable.
Selection of local main varieties
In vegetable cultivation, one or two vegetable species are often planted in one village or several neighboring villages. With scale, there is a reputation and merchants come in much more, and the dishes are better sold. In such an environment, it is difficult to secure a market if alternative measures are adopted to change other varieties of vegetables.
Whether the soil conditions give force
Different varieties of vegetables have different requirements for soil conditions. Some are suitable for sandy loam and some are suitable for clay loam soils. Therefore, when selecting a variety of vegetables for cultivation, local soil and soil conditions should be fully considered.
Is location advantage advantageous?
If you are far away from the market and you are remote, you should choose vegetables that are resistant to storage and transport, such as potatoes, onions, carrots, and cabbage. If you face large markets or large and medium-sized cities, you should choose higher-end, more diversified vegetable varieties in order to obtain greater economic benefits.
Can the planting scale force?
The choice of vegetables to grow depends on the size of the plant. If it is grown on a large scale, the variety of vegetables should not be too much, so as to avoid misconduct. Should choose to invest less, easy to sell large variety of roads.
Can the planting model profit
Vegetables include open fields, cold sheds, and greenhouses. Cold sheds and greenhouses are planted in anti-season crops with large investment. Generally, vegetables and vegetables with higher planting prices, such as tomatoes and cucumbers, should be selected.
There are many kinds of products which need filtration in industrial production. The material properties of these products are very different, and the purpose of separation is different. Therefore, it is necessary to select the filter equipment scientifically and reasonably according to the production needs such as material characteristics and separation purposes, in order to play its role effectively.
At present, the requirement of filtration equipment in industry is that the filtration accuracy is high, so that the solid content in the filtrate is low, and even the filtration precision is based on the number of solid particles in the filtrate.
In order to ensure the stability and reliability of the system, the cleanliness of the oil with precision components such as servo parts is strictly controlled in the international hydraulic system, and the new oil cleanliness is required to reach the fifth grade of the American Aerospace Standard nas1638 (American Aerospace Standard), so as to ensure the stability and reliability of the system. But in reality, the cleanliness of new oil is only 10-11 of nas1638. If the new oil is used without strict filter and purification, it will bring serious harm to the life of the precision components and the reliability of the work of the whole system. The cleanliness of hydraulic oil can be improved fundamentally only when circulating filtration is carried out simultaneously with the operation of hydraulic system.
Reverse osmosis filtration equipment is widely used in industrial production, industrial pure water system is designed from reverse osmosis process, referred to as reverse osmosis equipment. The water quality of reverse osmosis equipment is required before influent. If the water flow through reverse osmosis membrane directly through high pressure for a long time, it will cause membrane blockage.
In general, there are multi-medium filters, ion exchange, various kinds of precision filters in the pre-treatment equipment of the whole pure water system. These pre-treatment filters can effectively remove the suspended matter in the water.
According to the needs of the users, different levels of processes are used to make the quality of the produced water up to the standard. Of course, its price is also determined by the configuration of reverse
osmosis equipment.
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