For every 1,000 kilograms of scallion produced, 2.7-3.3 kg of nitrogen, 0.5-0.6 kg of phosphorus, and 3-3.7 kg of potassium are needed, and the three nutrient uptake ratios are 5.45:1:6.09. In addition to a large number of elements, the application of trace elements calcium, magnesium, boron, mang
Read moreHow should the pipette be used? The following two aspects will be set forth, hoping to help you! Correct assembly method of the tip (suction nozzle) When putting the pipette tips on the pipette, many people will knock on the tip box a few times. This is a mistake because it can cause internal c
Read moreChanges in the weather in autumn tend to make people unprepared. Irregular changes in cooling and heating make multiple diseases. The most common ones are stroke, bronchitis, asthma, stomach problems, and recurrence of cough. The main reason is that the human body is stimulated by cold air, which
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