The soil environment has an important impact on the growth of crops. Therefore, in order to ensure the safety of agricultural production, it is necessary to further refine the management of agricultural production and carry out scientific and effective environmental monitoring such as soil moisture. At present, with the promotion and application of various instruments, the soil moisture monitoring in the agricultural field is mainly using soil moisture monitors . The instrument can efficiently and accurately complete the determination of soil moisture in the field, and realize the automatic collection and transmission of data, which effectively improves the real-time, effectiveness and accuracy of moisture monitoring.
Soil moisture monitoring is of great significance in modern agricultural production management. First of all, it is an urgent need for agricultural drought resistance and disaster reduction; secondly, soil moisture monitoring is one of the important means to promote green and sustainable development of agriculture; third, the development of efficient water-saving agriculture The key link; Fourth, the technical support for building modern agriculture. Strengthening the monitoring of soil moisture and rationally developing and using water resources to adjust the layout of agricultural production is of great significance for promoting green and sustainable development of agriculture. Using soil moisture monitors to carry out soil moisture monitoring can on the one hand make up for the shortage of professional technical personnel in the grass-roots agricultural technology departments and reduce the pressure of manual monitoring. On the other hand, it can take advantage of technical advantages to regularly monitor moisture and provide basic data and technologies for drought relief and disaster reduction. Support, provide a scientific basis for the grassroots agriculture to carry out drought resistance and moisture protection, to achieve stable and high yields in agriculture.
The soil moisture monitor is easy to carry and simple to operate. It can be used to quickly and efficiently monitor soil moisture, measure soil moisture and temperature at different profiles, and obtain important soil moisture data. At the same time, the soil moisture monitor also provides additional According to the monitoring requirements, the corresponding sensors can be added to monitor air temperature, air humidity, light intensity, wind speed and direction, rainfall, carbon dioxide concentration, etc., so as to meet the needs of system function upgrades, powerful, practical and convenient.
Phenacetin 99% was widely used until the third quarter of the twentieth century, often in the form of an A.P.C., or "aspirin-phenacetin-caffeine" compound analgesic, as a remedy for fever and pain. An early formulation (1919) was Vincent's APC in Australia.
In the United States, the Cas 66-44-2 Phenacetine Food and Drug Administration ordered the withdrawal of drugs containing phenacetin in November 1983, due to its Pvc Resin carcinogenic and kidney-damaging Shiny Phenacetin properties. It was also banned in India. As a result, some branded, and previously phenacetin-based, preparations continued to be sold, but Phenacetin Crystal Powder with the phenacetin replaced by safer alternatives. A popular brand of Phenacetin Powder was Roche's Saridon, which was reformulated in 1983 to contain propyphenazone, Paracetamol and caffeine. Coricidin Ethylene-Vinyl Acetate was also reformulated without phenacetin. Paracetamol is a metabolite of phenacetin with similar analgesic and antipyretic effects, but the new formulation has not been found to have phenacetin's carcinogenicity.
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