Chinese cabbage soft rot is a common disease worldwide. Its symptoms are characterized by the fact ...
The design of large-scale centrifugation operations involves the use ...
The ground tiger is the main pest in the nursery. The heavier damage in my county is the small tig...
First, the calculation of mulberry leaf production. Usually spring silkworms use 14-15 kilograms o...
One, pea seedlings. After soaking, the pea seeds were inserted into a 60-cm 30-cm 30-cm rice seedl...
The decoction is a common method used by the ancient Chinese medicine...
1, bottom quality improvement. The bottom sludge of the pond is preferably loamy, and its fertilize...