Standardized fertilizer conversion method

Now introduce a simple standardized fertilizer equivalent to other fertilizer calculation methods: standard nitrogen fertilizer (nitrogen 21%), generally refers to iron sulfate; standard phosphate fertilizer (containing phosphorus 1.2%), generally refers to superphosphate; standard potassium fertilizer, potassium sulfate Potassium nitrite and potassium oxide are both around 60%.

At present, there are many kinds of nitrogen and phosphate fertilizers, and the content varies greatly. Ammonium bicarbonate contains nitrogen at 17.7%, urea contains 47% nitrogen, superphosphate contains about 11% phosphorus, and diammonium phosphate contains more than 42% phosphorus. %. There are other compound fertilizers with different contents. According to the wheat medium, 50 kg of standard nitrogen fertilizer is needed per mu, and 70 kg of standard phosphate fertilizer is needed. If it is replaced by ammonium bicarbonate, urea and diammonium phosphate, how much should it be applied?

The calculation method is as follows: a certain amount of chemical fertilizer = standardized fertilizer dosage × standardized fertilizer content / a certain fertilizer content. For example: 50 kg of standard nitrogen fertilizer for urea: 50 × 21% / 47% = 23 (kg) that is 50 kg of standard nitrogen fertilizer equivalent to 23 kg of urea and such as: 70 kg of standard phosphate fertilizer to diammonium phosphate: 70 × 12% /42%=20 (kg). That is, 70 kg of standard phosphate fertilizer is equivalent to 20 kg of diammonium phosphate, and 20 kg of diammonium phosphate is also equivalent to 21 kg of ammonium bicarbonate (algorithm as above). The rest are analogous.

Cryo Tube

Yongyue cryo vials are made of medical grade polypropylene (PP) and have no endotoxin. They are disposable laboratory consumables specially used for storing biological samples.
The anti-slip texture of the cap and body is easy to screw cap.
The tube cap has an O-ring built-in gasket to prevent liquid leakage.
The cryo tube is suitable for ultra-low temperature refrigerators, and the tolerance temperature is -86~121 °C, and it can be repeatedly frozen and thawed.
In the gaseous state of liquid nitrogen, it can withstand low temperature to -167 ℃.
According to different requirements, there are ordinary grade and PCR grade. PCR grade products are free of DNase, RNase, endotoxin and foreign DNA. Sterilized by gamma irradiation, sterile.

Cryo Vials,Cryovial 2ml,Cryotube 1.8 ml,Cryogenic Vials,0.5 ml Cryogenic Vials

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