(1) If the positive and negative plates of the welding plate can not be used anymore, the plates must be rewelded: 1 Select the plates. According to the height of the battery case, the plates are selected and the oxides on the plate ears are eliminated with a wire brush or a small file. 2 Adjust th ---MORE---
China is a big country for the production and sale of fruits. However, fruit rot has been serious. The annual loss of fruits caused by decay has reached 30 billion yuan. It is understood that the production of fruit trees is far from the city, and the mature fruit of similar fruits is also relative ---MORE---
The male-male differential technology of ducklings is an important and practical technology. Through this technology, the male chicks can be sorted out for fattening when they are born, saving the bred houses, feeds and equipment; Can be implemented to separate male and female breeding, can promote ---MORE---
To maintain a good lean type pig and increase lean meat percentage, we must focus on the following: 1. Pig breed: At present, the lean meat percentage of local pig breeds in China is only about 41%. After years of experiments, Nanjing Agricultural University screened out The three-way crossbred pig ---MORE---
If the humidity in the greenhouse is high, it can cause serious disease. The principle of humidity control is "head wet and dry." To reduce the humidity in the greenhouse, the following measures can be taken. 1. Ventilation. Excluding moisture and replacing it with dry air outside, this i ---MORE---
1Selected seeds were selected based on virus-free seed potato, such as Zaidabai, Dongnong 303, Jinyin 8 and Eugene 88-5. The 2 kinds of potatoes were treated with representative and disease-free excellent virus-free seed potatoes, and they were planted for one week before sowing. The cutting knife ---MORE---
The growth of the young tea tree at the top is obvious. At this time, it is very important to cultivate the tea tree canopy structure and the tea plantation phase that are both high in yield and stable in quality. For this reason, the author used more than five years to practice and explore the pra ---MORE---