Fruit trees are generally perennial, long-term growth in a fixed location, and periodically absorb some of the nutrients in the soil. If you neglect the nutrients needed to supplement fruit trees, it will easily lead to the occurrence of pests and diseases, the lack of certain nutrients, c.......

To ensure the safe use of the thresher, the following must be observed.

A bogey is not safe. When the harvest of summer and autumn grain ends every year and the thresher is no longer used, the thresher shall be thoroughly scrubbed and stored in the room. It shall not be thrown on t.......

1, pond preparation. The required pond area is between 1,300 and 2,000 square meters, and the water depth is about 1.50 meters. The water injection is convenient and the water quality is good. There is no weed around the pond. Each pond is disinfected with lime 125--150kg. The fish seedlin.......

(1) Nursery pond:
Black saplings can be cultivated indoors and outdoors. Indoors are cultivated with a 1.5-3.0 square meter concrete pool with a water depth of 1 meter. The cultivation density is 30,000-100,000 tail/m3, and the static water absorbs and exchanges water 1-2 times each d.......