In the process of using plant hormones, farmers often come across the term "ppm," which stands for parts per million and is used to express the concentration of a solution. For example, "20 ppm" means 20 parts of the substance per million parts of the solution.
To prepare a solution with a specific ppm concentration, it's common to first create a stock (or mother) solution. The method for making a stock solution is straightforward: take 1 gram of the active ingredient and dissolve it in enough water to make up 1,000 milliliters. This gives you a stock solution with a concentration of 1,000 ppm. Once prepared, store the mother liquor in a cool, dry place to maintain its potency.
When you need a lower concentration, simply dilute the mother liquor. For instance, if you want to make a 20 ppm solution, take 20 ml of the 1,000 ppm stock solution and add enough water to bring the total volume to 1,000 ml. This will result in a 20 ppm solution. Similarly, for a 45 ppm solution, take 45 ml of the stock and dilute it with water to reach 1,000 ml.
This method can be applied to create any desired concentration by adjusting the amount of stock solution used. It’s an efficient and accurate way to ensure proper application of phytohormones, which is essential for optimal plant growth and crop yield. Always double-check measurements and follow safety guidelines when handling chemical solutions.
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