The problem of pesticide residues in nectarines has a direct impact on China's export trade and has received much attention in the industry in recent years. Researchers believe that there are four major countermeasures for reducing pesticide residues in nectarines. First, the development o.......
The fertilizer requirement of maize is 2% of the total fertilizer requirement in the seedling stage, 85% in the spike stage, and 13% in the grain stage. According to the survey, for every 100 kilograms of maize produced, 2.5 kg of nitrogen, 0.9 kg of phosphorus, and 2.2 kg of potassium are req.......
As the all-male of tilapia grows faster and the individuals are relatively large, it has become an object for everyone to compete for breeding. Here is a brief description of the transformation control technology of all-male fish. 1. Physical control of artificially induced fish tetraploids is.......
The use of 40% sclerotined net wettable powder to prevent and cure vegetable sclerotinia is effective, but protectively grown vegetables such as celery and kidney bean are sensitive to the drug, which will inhibit the growth of kidney bean and celery after application, and delay the harvest of.......
1. How to raise and manage the rearing and management principles of the egg production period and the production of egg tarts are basically similar. The feeding and management of egg and meat types have their own characteristics. 1) Transferring group: The bred female cubs are 35 to 40 days ol.......
Summer temperatures are high and last for a long time, and egg production in chickens is extremely common. To maintain a high egg production rate, the following measures should be taken. 1. Do a good job in cooling the house (1) Increase ventilation in the house. Install ceiling fans or ventil.......
The air brake valve tappet of the small four-wheel tractor is made of plastic, and its outer diameter and length are often easily affected by thermal expansion and contraction, resulting in failure of the air brake valve. 1. Dimensional changes and failures When the outside diameter of the tap.......
How did the corn sprouts, which had grown bright and bright, become short and yellow and listless? Observe no traces of insect bites on the leaves or stems; No lesions or germs were found. In this case, the peasant allies did not panic, and the reason is probably rooted in the roots and roots .......
There is nothing more surprising than that of a father: A male salmon has a lot of rainbow trout offspring and is indeed born - these rainbow trout are extracted from salmon. The sperm is nurtured. Japanese scientists say their results are expected to be used to develop fisheries and even to p.......
One increase: Increase the use of fully cooked organic farmyard fertilizers to increase soil fertility. In recent years, the promotion of refined organic fertilizer has overcome the disadvantages of farmyard fertilizers and avoided the occurrence of fertilizer damage. Secondary Control: Contro.......