Affected by traditional farming methods and living habits, many farmers have abandoned or even incinerated large amounts of straw after harvesting crops, causing both waste and environmental pollution. The Institute of Soil and Fertilizer of Anhui Academy of Agricultural Sciences found that if 200 kg of straw is returned per mu of cultivated land, about 20% of phosphate and potash fertilizer can be reduced, that is, about 2 kg of potassium chloride and 5 kg of perphosphate can be used per mu of cultivated land. Calcium can save farmers about 15 yuan of fertilizer input per mu. However, it should be noted that straw returning to the field does not effectively increase nitrogen fertilizer, and the amount of urea should be adjusted at an appropriate time.
The safflower is rich in nitrogen, phosphorus and potassium nutrients. It was used as a green manure in many places before the fertilizer was applied in large quantities. The study found that the nitrogen, phosphorus and potassium contents of safflower were 0.48%, 0.11% and 0.24%, respectively. That is to say, if 500 kg of safflower was applied per mu of cultivated land, about 5 kg of urea and 5 kg of superphosphate could be reduced. And 2 kg of potassium chloride can save farmers about 25 yuan of fertilizer input per mu. At the same time, the method of planting safflower is simple. After sowing the seeds, “I don’t careâ€, the yield per mu is also about 1500 kg, and the soil structure can be improved. Guo Xisheng reminded that it is appropriate to apply about 500 kilograms per mu of cultivated land, and it is not possible to achieve the best fattening effect with more or less use.
In addition, the application of farmyard manure can also help farmers reduce fertilizer application and save costs. However, the accumulation and application methods of farmyard manure are not correct, which will result in the serious loss of nutrients and the effect of effective fertilization. Wang Guangyu, a researcher at the Anhui Academy of Agricultural Sciences, reminded that when farming, the fertilizer should be sealed to prevent nutrient volatilization and leakage, and the manure should be decomposed to increase the release rate of nutrients and kill various parasites, germs and Weed seeds; farmyard manure should generally be applied to the soil as a base fertilizer, and should not be stored and applied with alkaline fertilizers such as grass ash.
Temperature transmitter is an instrument that converts a temperature variable into a transmittable standardized output signal. Temperature transmitters convert physical measurement signals or ordinary electrical signals into standard electrical signal output or devices that can output in the form of communication protocols. A temperature transmitter is an instrument that converts temperature variables into a transmittable standardized output signal, and is mainly used for the measurement and control of temperature parameters in industrial processes. The current transmitter is to convert the AC current of the main circuit under test into a constant current loop standard signal, which is continuously sent to the receiving device
Features of the temperature transmitter:
1. Two-wire output DC4-20mA current signal, strong anti-interference ability;
2. Save the cost of compensation wire and installation of temperature transmitter;
3. Large measurement range;
4. Automatic compensation of cold junction temperature, non-linear correction circuit.
Applications of temperature transmitters:
Usually used with display instruments, recording instruments, electronic computers, etc., widely used in petroleum, chemical, chemical fiber; textile, rubber, building materials; electric power, metallurgy, medicine; food and other industrial fields for on-site temperature measurement process control; especially suitable for computer measurement and control The system can also be used in conjunction with the instrument.
Temperature transmitters make it possible to send a scaleable (4 to 20) mA signal from a Temperature Sensor to a control device without investing in long, expensive runs of thermocouple or RTD wire.
Pyromation carries programmable RTD and thermocouple temperature transmitters that can be mounted in the temperature sensor assembly connection head, or surface mounted using a DIN rail mounting clip. Some units offer a visual digital display that shows the current measured value. All are PC programmable and convert various signals into a scaleable (4 to 20) mA analog output signal. We also carry transmitters programmable with Hart® protocol for various signal inputs. Depending on type, some of Pyromation`s thermocouple and RTD temperature transmitters are UL recognized components and/or FM and CSA approved, including styles that are intrinsically safe and approved for use in hazardous locations.
Pyromation temperature transmitters are used in many demanding industries including Pharmaceuticals, Oil & Gas, Power Generation, Chemical, PetroChemical, and Food and Dairy.
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