Quote:
Originally Posted by edwmax
example: I use 10-10-10 available locally at $10 per 50 lb bag. For 1 lb of nitrogen, I need 10 lbs of fertilizer (1 lb/ 10%= 10 lb) per plant. The same 10 lbs will furnish 1 lb of potassium. Thus, a potassium supplement is needed. Using potassium sulfate (0-0-50) about 1 lb is needed (.5lb / 50%= 1 lb). ...
Knowing how to calculate the quantity of fertilizer needed, you can then use off-the shelf products and compare cost.
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Thanks for the explanation of the weights and the ratios. I have a question though. In the example of the potassium, you need 1# of 0-0-50 for a 1/2 # of potassium sulfate. What does the other 1/2# consist of?