There is a large selection of planting time this year. The 5-10 cm soil temperature in the plough layer stably passes 8°C-10°C, and the relative soil moisture content reaches 75%-80% when the crop is ready for sowing. At this time, all manpower and mechanical power should be concentrated on the sowing operation and the sowing task should be completed in a short time. Low temperature and humidity are prone to "rigidized seedlings" phenomenon. In the low-cold conditions, the roots are not well developed and the ability to absorb phosphorus is low, resulting in lack of phosphorus at the seedling stage and affecting the growth and development. There should be enough phosphorus in the fertilizer.
The saliva collection device is also called a saliva collector (saliva collector, Saliva Collection Tube, oral sampling tube). The most convenient sampling method for genetic testing is saliva, followed by blood. Currently, the most popular method is to collect saliva samples for testing. , Compared with blood collection, saliva collection is more convenient and free, and the user's acceptance is also higher.
Saliva Collector,Saliva Transport Collector,Toddler Saliva Collector,Saliva Collection Collector
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