1. According to market demand, varieties with more varieties of market demand should be selected as the first choice. This will not only satisfy the needs of the market, but also provide sufficient supply for the market and reduce the risk of planting, thereby increasing the economic efficiency of production. When introducing new varieties and exotic varieties, it is necessary to pay attention to doing a good job of market research, understanding and mastering the market's needs and development trends, and avoiding blindly introducing economic losses. Before the introduction of new varieties, small-scale tests should be conducted. After successful tests, demonstration and promotion will be conducted again. 2. According to the geographical environment, the climate conditions formed by the different geographic latitudes and altitudes are very different. The frost-free period at high latitudes and high altitudes is relatively shorter than that at low latitudes and low altitudes. At the same time, its thermal resources are not as good as those at low and high altitudes. Therefore, when selecting a variety, the geographic latitude and altitude of the source of the selected species should be ascertained. The varieties with similar geographical latitude should be selected as far as possible, and the growth period of the selected varieties should be close to or shorter than the local frost-free period, so as to avoid a serious reduction in production due to extension or shortening of the growth period due to the difference in latitude and altitude. 3. Selection of ecological conditions based on ecological conditions is the environmental conditions for the growth of crops, including water conditions, thermal resources, soil texture, soil fertility, and geographical forms. The selected species should be adapted to the local ecological conditions. The ecological conditions are good, and the varieties with good fertilizer can be selected; if the ecological conditions are relatively poor, the varieties with tolerance to barrenness and strong drought resistance can be selected. 4. According to the physiological characteristics of crops selected varieties of different physiological characteristics of different crops, mainly in the sensitivity of the photoperiod, there are two types of long-day crops and short-day crops. When selecting foreign varieties, it is necessary to clarify the type of sunshine in the crop and avoid introducing failures. Long-day crops extend from the north to the south, and on the contrary, the growth period is shortened; short-day crops are introduced from north to south, and the growth period is shortened. On the contrary, the growth period is prolonged. For example, corn, rice, and soybean are short-day crops. The growth period from the north to the south is shortened, but the growth period is prolonged. Wheat is a long-day crop, and the growth period from north to south extends, but the growth period is shortened. 5. The incidence of selected varieties of crops based on the incidence of crops is affected by the local climatic conditions, the soil environment and the disease resistance of the crop varieties themselves. Production can be based on the occurrence of disease in the previous year or in recent years to select the appropriate species. In crops with severe disease occurrence in the previous year or in recent years, varieties with strong resistance to the same disease should be selected. If the incidence is lighter, you can choose the kind of disease resistance. In the selection of corn varieties, it is also important to note that the land that has experienced severe head smut in the past must be selected for high resistance to head smut, in order to prevent the recurrence of head smut and lead to serious reduction in production.
Blood Pressure Apparatus
Electronic smart digital Upper arm and Wrist Blood Pressure Monitor automatic.
we are manufacturer of Blood pressure monitor for more than 12 years, we can accept OEM/ODM as for your requirements.
More closer to our peoples' heart, so the result of measurement will be more accurate.
Main Feautures For Electronic Sphygmomanometer Automatic BP Machine Digital Upper Arm Blood Pressure Monitor:
· Measurement method: oscillometric method
· Display screen: LCE big digital display shows high pressure / low pressure / pulse
· Blood pressure classification: WHO sphygmomanometer classification indicates blood pressure health
· Intelligent pressurization: automatic pressurization and decompression, IHB heart rate detection
· Year/month/day time display
· 2*90sets of measurement results memory for two people; the average reading of the last 3 measurements for data comparison
· One button measuremment,automatic turn on-off for convenient operation
· Blood pressure value unit Kpa and mmHg for conversion (boot default unit is mmHg)
Comfortable cuff included
· voice broadcast function is optional,any OEM demand available
Medical Blood pressure apparatus,electronic Blood pressure apparatus
Shenzhen Urion Technology Co., Ltd. , https://www.urionhealth.com