Calculation of fertilizer dosage Different fertilizers contain different amounts of pure nitrogen, pure phosphorus, and pure potassium. Generally, the content of various active ingredients is written on the packaging. When chemical fertilizers are applied to crops, the amount of pure nitrogen, pure phosphorus, and pure potassium should be determined first according to the needs of the crops. This is based on the actual amount of the chemical composition of the fertilizer. The calculation method is: the required fertilizer weight is equal to the required nutrient content of the crop divided by the proportion of available nutrients contained in the fertilizer. For example, according to the needs of wheat growth, 10 kg of pure nitrogen is required per acre, and the urea nitrogen content is 46%, 100.46≈22, which means that the application amount of urea per mu is about 22 kg. For another example, if the content of ammonium bicarbonate is 17%, if it is required to apply 10 kg of pure nitrogen per mu, 100.17≈59, then the amount of ammonium bicarbonate applied per acre is 59 kg.
Pesticide Dilution Concentration Calculation Commercial pesticides generally have a high concentration. When pests and diseases are controlled, they must be diluted with water to a low-concentration aqueous solution. How much water is appropriate? The calculation method is to divide the difference between small molecules and large molecules and then multiply the amount of solution. The result is that the amount of water should be added. For example, if the active ingredient of a certain kind of pesticide is currently 20%, for a total of 30 kilograms, to dilute the 30 kilograms of pesticide to a 16% solution, it is necessary to calculate how much water is added. Among them, the size of the molecular difference is 20-16=4, the small molecule is 16, the amount of solution is 30 kg, and 41630=7.5, which means that as long as 7.5 kg of water is added, the original drug can be diluted to 16% of the aqueous solution. .
The calculation formula for the conversion of square meters and acres of converted square meters to acres is "plus half left shift three." 1 square meter = 0.0015 acres, such as 128 square meters equal to how many acres? The calculation method is to use 128 and 128 half of 128: 128+64=192, and then move the decimal point to the left by 3 bits, which means that the number of acres is 0.192. Mu for square meters, the calculation of the mouth is "divided by three times the right shift three." To calculate how many square meters 24.6 acres is equal to 24.63 = 8.2, 8.2 after doubling to 16.4, and then the decimal point to the right shift 3, that is, 16400 square meters.
The formula for calculating the amount of plastic film used per kilogram of plastic film (kg) is: Thickness density coverage 666.7. Coverage is calculated using the formula: mulch width (average line spacing 2) 100%. If it is known that the thickness of the film is 0.007 mm, the density value is 0.95, the width is 90 cm, and the average line spacing is 60 cm. To calculate the number of kilograms of mulch used per acre, first calculate the coverage rate: 90 (602) 100% = 75%, and then calculate the amount of plastic film per acre land: 0.0070.9575% 666.7 = 3.3, indicating that the amount of film per acre is 3.3 kg.
Pesticide Dilution Concentration Calculation Commercial pesticides generally have a high concentration. When pests and diseases are controlled, they must be diluted with water to a low-concentration aqueous solution. How much water is appropriate? The calculation method is to divide the difference between small molecules and large molecules and then multiply the amount of solution. The result is that the amount of water should be added. For example, if the active ingredient of a certain kind of pesticide is currently 20%, for a total of 30 kilograms, to dilute the 30 kilograms of pesticide to a 16% solution, it is necessary to calculate how much water is added. Among them, the size of the molecular difference is 20-16=4, the small molecule is 16, the amount of solution is 30 kg, and 41630=7.5, which means that as long as 7.5 kg of water is added, the original drug can be diluted to 16% of the aqueous solution. .
The calculation formula for the conversion of square meters and acres of converted square meters to acres is "plus half left shift three." 1 square meter = 0.0015 acres, such as 128 square meters equal to how many acres? The calculation method is to use 128 and 128 half of 128: 128+64=192, and then move the decimal point to the left by 3 bits, which means that the number of acres is 0.192. Mu for square meters, the calculation of the mouth is "divided by three times the right shift three." To calculate how many square meters 24.6 acres is equal to 24.63 = 8.2, 8.2 after doubling to 16.4, and then the decimal point to the right shift 3, that is, 16400 square meters.
The formula for calculating the amount of plastic film used per kilogram of plastic film (kg) is: Thickness density coverage 666.7. Coverage is calculated using the formula: mulch width (average line spacing 2) 100%. If it is known that the thickness of the film is 0.007 mm, the density value is 0.95, the width is 90 cm, and the average line spacing is 60 cm. To calculate the number of kilograms of mulch used per acre, first calculate the coverage rate: 90 (602) 100% = 75%, and then calculate the amount of plastic film per acre land: 0.0070.9575% 666.7 = 3.3, indicating that the amount of film per acre is 3.3 kg.
Fuzhou Contay Biotechnology Co., Ltd is selling PQQ, PQQ Disodium Slat, Vitamin K2 MK7, Folic Acid, Co-Q10.
Dietary Supplement and Food additives
Pyrroloquinoline Quinone,Pqq Acid,PQQ disodium salt, Vitamin K2 MK7
Fuzhou Contay Biotechnology Co., Ltd , https://www.contaybio.com