View Full Version : Nitrogen formula

06-08-2004, 03:29 PM
I have lost the formula for figuring the pounds of nitrogen in a bag of fertilizer. Thanks in advance.:confused:

06-08-2004, 04:00 PM
for a 50# bag, divide the first # (N) by two. I.E. 25-5-15 has 12.5 # of N.

06-09-2004, 12:25 AM
The numbers represent the percentage in the bag. For example a bag of 25-5-15 would have 25% Nitrogen, 5% phosphorus and , 15% potash. Therefore, you'd simply multiple the weight of the bag (or product) by 25% for lbs of N.