I thought this was interesting, so I copy pasted it from elsewhere online.
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Nitrogen, being the largest nutrient
component, has been given the value of 100. Other nutrients are listed
as a weight percentage of N. N 100
P 13-19
K 45-80
S 6-9
Mg 5-15
Ca 5-15
Fe 0.7
Mn 0.4
B(oron) 0.2
Zn 0.06
Cu 0.03
Cl 0.03
M(olybden) 0.003 -----
