The production of pollution-free black beans, the production of the environmental indicators should be consistent with environmental standards of pollution-free food production environment. First, species selection and processing According to the type of local production ecological conditions .......

1. The sowing period of winter soybeans during sowing is quite elastic. The difference in the sowing yield from the beginning of April to the beginning of June is not obvious. In practice, in order to obtain suitable basic seedlings for winter soybeans, and in addition to properly determining .......

Sandawang is also a perennial plant, characterized by strong adaptability, high yield, and rich nutrition. It is not only a good feed for livestock and poultry, but also a good green manure for fertile farmland. It also has the role of sand and soil conservation. The main points to be cultivat.......

Rice gill disease (rough blight) has occurred in a considerable number of areas in our province. Zhuxiang Town of Changfeng County has concluded in recent production practices that if jaundice and dead cockroaches are found on seedbeds, timely prevention and control can avoid greater damage. L.......

With the constant development of the medical industry, medical equipment continues to develop, now gynecology examination table is widely used in hospital, it is an indispensable part of medical eq.......

1, fish pond choice.
Choose the leeward sunny winter (more than 2 meters) fish pond natural wintering. Wintering pool water should not be static for a long time. Usually 20-30 days, replace some pool water, change the pool water every 1/4 to 1/5 to prevent pool water pollution.

2.......

I. Introduction 1. Biological characteristics 1. Morphological characteristics and distribution. Black crickets are elongated and flat. Body length is generally 20-30cm, weight 100-300g. The kiss is more pointed, the mandible is longer than the maxilla, and the two jaws, the vomer and the chee.......

l, feeding conditions. Yuan Yuan likes to live in loose, moist, humus-rich loose soil, its adaptability is very strong, as long as maintain a certain temperature and humidity, can be raised everywhere. 2, three-dimensional factory feeding. The equipment used by the cultivator is relatively si.......

Taihu whitefish scientific name mouth red, also known as mouth, white fish, white, body length, side flat, head straight back, upper mouth, jaw strong, upturned, erect in front of the mouth, large eyes, small scales, Sideline scales 80~93, dorsal fins with strong and smooth spines, anal fins I.......

At present, broilers generally adopt the method of feeding any chicken to eat freely, and give it light day and night. Although there are stages in the feed supply, there is no restriction on feeding, and physical training and cultivation are not paid attention. As a result, in the middle and .......

Variety Profile: Gully, scientific name of the channel catfish, also known as the United States? Fish. Native to the Mississippi River in the United States, it is a large freshwater carp, with a maximum of 70 pounds or more. The introduction of our country in the mid-1980s has been successful........

People often say: “The goose is good for raising and the young are difficult to breed.” In the scale production, the mortality of goslings from 0 to 21 days of age is relatively high. Among them, the death caused by poor environmental conditions and unscientific management accounts.......