Cavins, et al. Although is the basis used in this example, the conversion factor can vary between and This conversion factor is an average due to the variability in the type of fertilizer salts that contribute to the substrate EC in each sample, and it should be considered a broad approximation. Various acids to add to irrigation water for acidification 1. Note: The table is an example from software called Alkalinity Calculator, available at www.
It is an acidification analysis done on a water sample with a starting pH of 8. For your specific water sample, download the Alkalinity Calculator and follow the directions listed on the website. You will need to obtain a water report on your irrigation water prior to running the software. You will need to know the water pH and alkalinity of your sample and have an idea about what end-point pH you want to obtain after acidification.
The software also gives you information about the cost of the acidification treatment. Use the information above for modifying your fertility program. Amounts of nutrient sources to combine in making various fertilizer formulas 1. To dissolve, use very hot water and stir vigorously. Sediment formation should not cause concern. Use crystalline potassium chloride if possible. NOTE: For example, an formula fertilizer can be formulated by blending together 1 lb of ammonium nitrate plus 2 lbs of potassium nitrate plus 1 lb of ammonium sulfate.
This formulation is determined by locating the formula in the Analysis column. Then the three numbers 1, 2 and 1 are located in the row after this formula. Each of the three numbers is traced to the X above it and then to the nutrient source to the left of the X. Formulas for additional fertilizer calculations. Miscellaneous conversions used in fertilizer calculations. Approximate weight-volume measurements for making small volumes of water soluble fertilizers.
Materials and rates necessary to lower the pH level of greenhouse potting substrate 0. Approximate amount of materials required to change pH of peat-based potting mixes 1. Pounds per cubic yard to change acidity to pH 5. Table 23A. Fluid Ounces per Gallon of Final Solution. Milliliters per Liter of Final Solution.
Table 23B. A Commonly referred to as B Commonly referred to as Table 23C. Table 23D. Table 23E. Table 23F. Table 23G. Table 23H. Pre-plant fertilizer sources and rates of application 1,2. To provide micronutrients: iron, manganese, zinc, copper, boron, molybdenum. Only limestone is necessary in seedling substrates. Optional nutrient sources for seedling substrate include up to 1 lb 0.
Horticultural grade vermiculite 2 size for seed germination 2 or 3 for transplanting. A 15 to 20 percent shrink occurs in mixing. Therefore, an additional 5 cubic feet or 4 bushels are used to obtain a full cubic yard. If only 5 pounds of limestone are used for pH control, then add the gypsum that supplied calcium and sulphur.
You can do the reverse unit conversion from lbs to oz , or enter any two units below:. The pound abbreviation: lb is a unit of mass or weight in a number of different systems, including English units, Imperial units, and United States customary units.
Its size can vary from system to system. The most commonly used pound today is the international avoirdupois pound. The international avoirdupois pound is equal to exactly The definition of the international pound was agreed by the United States and countries of the Commonwealth of Nations in The pound is a US customary and imperial unit of weight.
A pound is sometimes also referred to as a common ounce. Pounds can be abbreviated as lb , and are also sometimes abbreviated as lbs , lb m , or. For example, 1 pound can be written as 1 lb, 1 lbs, 1 lb m , or 1. You are here. Ounce Value:. Results in Pounds:.
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