Urea, scientific name of diammonium carbonate, nitrogen content between 44% to 46%, biuret should be ≤ 0.9% to 1.5%. At present, it is the fertilizer with the highest nitrogen content in China's solid ammonia fertilizers. It has relatively stable physicochemical properties. The pure produ

Ammonium bicarbonate should be applied deeply. Ammonium bicarbonate is very unstable, and it is most easily decomposed into ammonia and volatilizes. The higher the temperature, the greater the volatilization loss, so it should not be used in greenhouses, nor should it be applied to topsoil. Ditchi

Rehmannia glutinosa (Gaertn.) Libosch is a perennial herb of the family Scrophulariaceae, and its roots are used as medicine. With Yin and kidney, heat and cooling blood, through the blood, eliminate blood stasis and other functions. Due to the different processing methods, medicinal herbs have di

At present, the annual average utilization rate of chemical fertilizers in China is only 30%, of which the utilization rate of nitrogen fertilizer is generally 30%-50%, the utilization rate of phosphate fertilizer is generally 10%-15%, and the utilization rate of potash fertilizer is generally 40%

At present, there are five forms of Formula Fertilizer Domestic Compatibility Series. The first is ammonium nitrate-sodium superphosphate-potassium chloride: suitable for the production of low-concentration BB fertilizers, promotes the processing of superphosphate and organic matter, trace elemen

Symptoms During the growth and development of the corn, it suddenly encountered heavy storms or typhoons that caused lodging. There are three kinds of lodging: First, the characteristics of corn varieties, normal plant height 30-40cm before growth, and then lodging, showing the habit of earthworm

How good is a fermented duck? Zhang Baoquan With the application of pig-raising chickens in fermentation beds, certain economic benefits have been achieved. First, clean and environmentally friendly, whether it is online duck shed or ground duck, taste great. The taste of the duck bed on the fe

"Two-best" fertilization of fruit trees refers to selecting the best time for fertilization; the second is to apply the fertilizer to the best parts of fruit trees. I. The best time for top dressing According to the characteristics of fertilizer required during the various phenophases o

First, the nutritional characteristics of Chinese cabbage. About 1.5 kg of nitrogen (n), 0.7 kg of phosphorus (p2o5), and 2.0 kg of potassium (k2o) are absorbed per 1,000 kg of Chinese cabbage. The ratio of nitrogen, phosphorus, and potassium is approximately 1:0.46:1.33 throughout the growing sea

The method of fertilization for cabbage includes basal fertilizer and top dressing. Basal fertilizer can account for more than half of the total fertilization. Basal fertilizers should mainly be decomposed high-quality organic fertilizers, but also apply appropriate amounts of nitrogen, phosphorus

Formaldehyde is a highly toxic substance, and formaldehyde ranks second in the priority control list of toxic chemicals in China. Formaldehyde has been identified as a carcinogenic and teratogenic substance by the World Health Organization and is a recognized source of all

1. Determine whether to apply silicon fertilizer based on the abundance of silicon in the soil. According to soil analysis tests to determine whether the local soil silicon content below the critical value, usually the effective silicon content in the soil in the range of 127 ~ 181 mg / kg is a lac