Cabbage, autumn and winter cabbage, autumn and winter radish, carrots, autumn and winter autumn vegetables such as cauliflower after entering the ball stage or root swelling period, to re-apply fertilizer, fertilizer should generally be heavy once again, timely drainage after rain. Prevention of d ---MORE---
First, material purification TMV virus solution (10mg/ml). Second, equipment, frozen desktop centrifuge, low temperature vacuum dryer, electrophoresis apparatus, electrophoresis tank. Third, reagent TE-saturated phenol: chloroform (1:1), chloroform, 3M NaAc (pH 5.2), ethanol (100% and 70%), TE b ---MORE---
First, artificial breeding of fry 1. Select broodstock to choose 3rd to 5th instar and weigh 2.5kg~3.5kg of broodstock. In the non-reproductive season, males and females have slightly wider heads, darker body colors, and slightly narrower female heads. During the reproductive season, males have l ---MORE---
According to the national regulations for packaging, the chemical fertilizer packaging bag must indicate the product name, nutrient content, grade, trademark, net weight, standard code, factory name, site, and production license number. In addition, attention should be paid to checking the seal of ---MORE---
Pingtan County Aquatic Products Farm was meticulously reared by scientific and technical personnel. In the month of January 2000, 1 million pieces of abalone seedlings with a size of more than 1.5 cm were placed, and more than 300,000 black abalones were cultivated. Significant economic benefits we ---MORE---
Chrysanthemum is a famous flower in China because of its variety, colorfulness and versatility. In addition to its high ornamental value, it also has medicinal and edible value, and it is popular among the public. However, there are many pests and diseases in the process of chrysanthemum planting. ---MORE---
The correct use of transport throttles can not only reduce carbon deposition, reduce the wear and tear of transport parts, and prolong the service life of the machine, but also is one of the important measures to reduce fuel consumption. 1. Don't abruptly change the throttle during transportat ---MORE---