Filter efficiency test method exchange

Filter efficiency test method text explanation Weighting method The test dust source is a large particle size, high concentration standard dust. The main component of the dust is the selected floating dust in the specified area, and then the specified amount of fine ......

Pigs have diets after taking medicine

Mungbean mung bean can be venomously detoxified, and can also be taken as a hundred herbs, and should be fasted to the pig after taking it. Sorghum sorghum contains tannic acid, which has a strong astringent effect and is banned when pigs take laxatives. In addition, tannic acid can denature iron ......

Key Techniques for Growing Seedlings in Winter Watermelon

Improve the heat preservation and heating measures for nursery sheds. Replace polyethylene film with poly vinyl cyanide non-drop film. The heat preservation and performance are greatly improved. The temperature of the shed can be increased by 1°C~2°C. Temporary heating such as fire wall or h ......

Use tractors properly in winter

In winter, the temperature is low and the working conditions of the tractor deteriorate. If it cannot be used properly, not only the tractor will be damaged, its service life will be reduced, but also the accident will be easily caused. Therefore, the following matters should be taken into account ......

Laboratory commonly used instrument centrifuge introduction

A centrifuge is a special instrument that separates and precipitates a mixture (containing solids) by centrifugal force. Commonly used electric centrifuges in the laboratory include low-speed, high-speed centrifuges and low-speed, high-speed refrigerated centrifuges, as well as overspeed analysis a ......

Straw returning technology (9)

9. The purpose of applying nitrogen and phosphorus fertilizers to adjust the carbon-nitrogen ratio (C/N) of straw after application of straw to the field is to promote the decomposition of straw organic matter and to adjust the balance of soil available nitrogen, and to avoid the fixation of effect ......

Lin Yi's economic value

The use of earthworms has a long history in China. In the Ming Dynasty, "In the middle of Guangzhong Research," there was "more mountains in northern Sichuan, love their umbilical cords, and each person was swift and impatient, that is, he turned to Gao Yan and cracked the incense. ......

Comprehensive prevention and control of sesame disease

Sesame seeds are grown as high-oil crops. Because sesame causes a large area of ​​death or severely reduced production due to disease, coupled with less technical data on sesame, it is prone to errors in the diagnosis and control of diseases. Now sort out the diseases and comprehensi ......

Multi-use microbial fertilizer can prevent drought

Drought is severe this year, and the use of microbial fertilizers containing Bacillus mucilaginosus can effectively prevent drought. The reason is that: Bacillus is also called silicate bacteria. It is a silicate bacterium that has strong potassium-removing ability, which is selected from the root ......