See if the fertilizer is even 1. The product water content is too high or too low are not conducive to the species survival, judgment methods: grasping a handful of fertilizer observed in the sun, was a group of cloudy tide, dry ash are not normal products. 2. The organic fertilizer nutrition suitable for the growth of special functional strains should be a package type, composed of a variety of organic nutrients (such as: fermented rapeseed, soybean flour, etc.), can see the traces of raw materials under light, or can Smell the special smell of raw materials. See if the effect is efficient In the test method, a small amount of water is used to transfer the biological organic fertilizer into a lump, frozen in ice in the refrigerator, and dissolved in the next day. Three times, the bacteria in the fertilizer will be frozen or greatly reduced; this is used It is compared with the original product and observes the difference in the same field. The difference is obviously a good fertilizer. The difference is not obvious, indicating that the product has problems and it is recommended to abandon the use. See if the packaging is normal The product registration certificate has the Ministry of Agriculture's Microbiological Fertilizer Registration Certificate No. (Note: Provincial Departments have no right to registration). The correct method: Microbial fertilizer (registration year) Pro word (number) or microbiological fertilizer (registration year) Quasi-word (number) number; Product technical indicators effective live bacteria count (CFU) is RMB 0.2 billion per gram. When registering, the Ministry of Agriculture only allows the labeling of 0.2 billion per gram and 0.5 million per gram (strictly stipulated that this value must be reached on the last day of the preservation period). In order to cater to the market, some companies have deliberately marked hundreds of billions of dollars. This is unscientific (the current technology is difficult to achieve) and is wrong. The period of product validity is greater than 6 months. With the extension of the storage time of bio-organic fertilizer products, the number of viable bacteria will continue to decline, and it is irresponsible to mark the validity period too long. JRT usb interface distance sensor board adds a USB port to a Laser Distance Sensor, inexpensive laser distance measurement sensors, allowing customers directly using GBeacon-2.3-Fx.exe software to control the rangefinder sensor. Usb laser distance sensors are the the most popular model devices, it works by measuring the phase of an visible-red laser beam that reflects on the target. Usually, customers would like to choose CH341SER.EXE version to test. USB Laser Distance Sensor,Distance Sensor,Laser Distance Sensor,Distance Measurement Sensors Chengdu JRT Meter Technology Co., Ltd , https://www.rangesensors.com