Numbers On Fertilizer Bags
fertilizer bag has three or more numbers written in it to indicate
the amount of each nutrient it contains.
first number indicates the NITROGEN content measured as % N.
The second number
indicates the PHOSPHORUS content measured as % P2O5
The third number
indicates the POTASSIUM content measured as % K2O
additional numbers indicates the levels of other nutrients. These
must be specified. This method of expressing nutrient content
is internationally accepted and is law in many areas.
numbers (the fertilizer formula) help in choosing the correct
example, if the soil is deficient in phosphorus, then the second
number must be high. In this case, 12.24.12 is suitable, 26.0.26 is
formula also allows you to compare fertilizers. One bag of urea
(46.0.0) provides more than twice as much nitrogen as a bag of
ammonium sulfate (21.0.0).