The adsorption principle of the activated carbon filter is to form a balanced surface concentration on the surface of the particles, and then adsorb the organic substance impurities into the activated carbon particles, and the adsorption effect at the initial stage is h ---MORE---
The day of transfer should be sorted by size, strength and weakness, and two sick pigs should be kept so that the weak constitution can be singled out and put together. Generally about 18 columns per column, the summer can be adjusted to about 12-15. Ensure that each piglet has 0.3-0.4m2 of space, ---MORE---
Once the vegetables are flooded, they have a great impact on the yield. To reduce disaster losses, the following technical measures can be taken. Timely cultivating: When the land can be ploughed, timely cultivating tillage soil, remove compaction, improve soil permeability, spray 800 times of ne ---MORE---
With the increase of temperature, melons grow rapidly and have reached the critical period of field management. In recent days, some farmers have reported that melons have a small melon and fruit cracking during their growth. How can this be solved? Prevent small fruits Early to strengthen ferti ---MORE---
The nutritional characteristics of pregnant sows are to control the appropriate level of nutrition. China's feeding standards stipulate that when the weight of sows in the early pregnancy (80 days before pregnancy) is 90-120kg, the daily feed intake is 1.7kg, the weight is 120-150kg, the daily ---MORE---
The tomato leaf scab disease mainly damages the leaves, and the initial disease is brownish ring-shaped spots. It expands to a round or round elliptic brown-spotted lesion. The diameter is 0.3 to 1.5 mm, and the outer edge of the lesion has a yellow halo circle. The middle has a brownish brown rin ---MORE---
Tomato Botrytis cinerea is a common fungal disease that can spread with air, water, and management operations. Its prevention and control methods are as follows: Strengthen the ventilation and temperature control and reduce the humidity in the greenhouse. Low temperature and high humidity are imp ---MORE---