How to calibrate an electronic balance to reduce errors

How to calibrate an electronic balance to reduce errors 2009-1-5 In the verification (test), we found that the first measurement test of the balance has a large error. The reason is that a considerable part of the instrument has not been calibrated in a long time interval, and it is considered th ...more...

Ammonia Harm in the Pig House and Control Measures

Ammonia Harm in the Pig House and Control Measures With the continuous increase in the scale of animal husbandry production and intensification, the ammonia produced by livestock and poultry and their wastes has been increasing, and a farm with an annual output of 100,000 pigs emits 159 kg of amm ...more...

The smell of earthworms

The fishy smell of squid is similar to that of other freshwater cultured fish. Its origin is mainly due to the release of chemicals released from the algae such as Oscillatoria, Aquilegia, and actinomycetes in the culture water during the growth and reproduction process. In the water, it infiltrate ...more...

How to manage the greenhouse temperature in winter

How can we increase the temperature in the greenhouse and effectively prevent the occurrence of chilling and freezing damage? In cold season, low temperature, especially low night temperature, is the most unsafe factor in greenhouse production, and it is the main constraint factor causing cold dam ...more...

Rhubarb cultivation techniques

1. Appropriate species: Planting in mountainous areas with an altitude of 1,500 meters above sea level shows good growth performance. 2. Site preparation fertilization: The soil is deep, loose, fertile, well-drained humus soil, and neutral slightly alkaline sandy soil. In the spring thaw, accordin ...more...

Fertilizer fermentation in winter to pay attention to what i…

Fertilizer fermentation in winter to pay attention to what issues? Fertilizer fermentation can start fermentation if it meets the requirements of temperature, moisture, etc. Fermentation of livestock manure or leaves, bark, etc. with a fertilizer starter can be easily started in the summer, and th ...more...

Simple flower removal method

There are many kinds of pests that occur in flowers. Some pesticides can prevent and cure flower pests to achieve better results. The method is simple and convenient, and it saves money. 1. Tobacco: It has stomach poison, contact and fumigation. Due to its strong penetrating power, it can cause d ...more...