When you buy a fertilizer bag, you can read clearly the percentage nitrogen (N), phosphorus (P2O5), and potash (K2O) by weight on the bag. For example, So, a 100-pound bag of 10-20-10 fertilizer contains 10 pounds of nitrogen, 20 pounds of phosphorus, and 10 pounds of potassium. This equals a total of 40 pounds of nutrients. The rest of the fertilizer, or 60 pounds in this example, is a carrier or filler such as sand. Read more about nutrients in a fertilizer bag.
Per Acre or Per Sqft Fertilizer Calculator
Well after you understood the nutrients packed in a fertilizer bag, a problem arise regarding the quantification of fertilizer based on the area of land. This is needed to maintain a proper balance and preventing excess application of fertilizer. So here is a simple calculator that provides you some solid numbers about the amount of fertilizer need per acre and per sqft.
In the next posting, we will publish a calculator for knowing the amounts of fertilizer in pints, cups, tablespoons, and teaspoons which is very useful when you curate gardens through pots.