First, materials and methods

Test facility

Bottom filling aeration equipment includes Roots blower, power equipment, galvanized steel pipe, microporous pipe, PVC pipe, valves, timer switch, etc., equipped with water quality testing equipment. The main pipe is galvanized ste.......

The wild duck is a common name for various wild ducks and is commonly known as the mallard in the northern hemisphere. Due to its wide adaptability, good social habits, easy feeding, fast growth, high survival rate, and delicious meat quality, ducks are favored by farmers. Therefore, more .......

First, after the use of agricultural machinery to conduct a comprehensive maintenance in a timely manner.

Second, iron parts should be cleaned, painted with oil, butter or antirust paint after drying, especially the screws and other connections, to prevent rust to shorten the servi.......

1. Choose the land to build the garden: The mountain area should make full use of the mantle and the slope of the soil. This will not only increase the economic benefits, but also can protect the soil and prevent soil erosion. Plains should be built into a special rose garden. However, reg.......