With the development of economy, the relative shift of rural labor force and the relative concentration of food production. Demand for medium-sized tractors such as Shanghai 50, Shanghai New Holland, and Jiangsu Qingjiang has increased, and intensive agricultural operations have been promo.......

Symptoms mainly affect the leaves and stems. At the beginning of the disease, the leaves developed small round tan patches on the leaf surface or on the back of the leaves. After the rupture, dark brown powder was scattered. Later, a dark brown bulge appeared .......

During the winter season in greenhouses or during the investigation of vegetable production in Daejeon, some common peppers grew well in the early period, and some of the peppers were accompanied by a sudden wilting; some of the peppers grew slowly and were not frozen; some had serious dro.......

Symptoms The disease mainly affects the leaves and also infects flowers, fruits and stems. Occurred in the late tobacco growth. At the beginning of the disease, the leaves became dark brown with water-stained small round spots. After the expansion, there was a.......

In the cage breeding, when the fox is weaned, the fox is first taken away. After a week, two foxes of similar body size are placed in a cage, about 20 centimeters from both sides of the cage. A feeding port for feeding, under normal circumstances can always feed to the skin.

There .......

With the long-term heavy use of chemical pesticides in crops, especially in vegetables, the issue of pesticide residues has attracted increasing attention. People are increasingly calling for pollution-free vegetables, eliminating pesticide residues from the source and developing green agr.......

The main reason for causing the engine to "fly" is that the engine governor malfunctions or gets stuck in a high speed position; the intake pipe enters excess fuel or oil, such as the oil level of the wet air filter is too high or the glow plug valve of the diesel fuel fails Wait.......

Formulations used for artificial passive immunization, collectively referred to as immune sera, include antibacterial serum, antiviral serum, and antitoxins. After the animal is infected with the pathogen, the use of immune serum means that the antibody is directly input into the animal, w.......

In recent years, the phenomenon of biting pigs in large-scale pig farms has gradually increased, especially in weaned pigs, which seriously affects the health and growth performance of pigs. According to relevant data, the growth rate of these pigs is lower than that of normal pigs. 26% to.......