The task of pruning cherry in the initial stage of greenhouses is to complete crown cannin…

Apply base fertilizer. Watermelon field basal fertilizer generally applies 40 kg of ecolog…

According to different production purposes and physiological characteristics, breeding ewe…

Spray drying system form

Centrifugal spray drying is …

The best way to identify estrus in sows is when the sow is calm for half an hour after fee…

The site of the victim was a yellow shift, with a brown gradient, and turned dark gray or …