Many prefixes such as mineral, inorganic , or chemical are often used to describe fertilizers and these are used interchangeably.
Fertilizer grade is an expression referring to the legal guarantee of the available plant nutrients expressed as a percentage by weight in a fertilizer, e.g. a 12-32-16 grade of NPK complex fertilizer indicates the presence of 12 % nitrogen (N), 32 % phosphorous (P 2 O 5 ) and 16 % potash (K 2 O). On a fertilizer bag, the NPK content is always written in the sequence N, P 2 O 5 , K 2 O.
Active ingredient | N-P2O5-K2O | Appearance |
40% | 17-8-15 | granular size2-4mm, 90% min |
40% | 11-6-23 | granular size2-4mm, 90%min |
40% | 28-12-0 |
granular size2-4mm, 90% min |
40% | 20-20-0 | granular size2-4mm, 90%min |
42% | 16-8-18 | granular size2-4mm, 90%min |
43% | 16-6-21 | granular size2-4mm, 90%min |
45% | 15-15-15 | granular size2-4mm, 90%min |
45% | 19-7-19 | granular size2-4mm, 90%min |
45% | 14-16-15 | granular size2-4mm, 90%min |
46% | 16-8-22 | granular size2-4mm, 90%min |
48% | 16-16-16 | granular size2-4mm, 90%min |
Active ingredient | N-P2O5-K2O | Appearance |
40% | 17-8-15 | granular size2-4mm, 90% min |
40% | 11-6-23 | granular size2-4mm, 90%min |
40% | 28-12-0 |
granular size2-4mm, 90% min |
40% | 20-20-0 | granular size2-4mm, 90%min |
42% | 16-8-18 | granular size2-4mm, 90%min |
43% | 16-6-21 | granular size2-4mm, 90%min |
45% | 15-15-15 | granular size2-4mm, 90%min |
45% | 19-7-19 | granular size2-4mm, 90%min |
45% | 14-16-15 | granular size2-4mm, 90%min |
46% | 16-8-22 | granular size2-4mm, 90%min |
48% | 16-16-16 | granular size2-4mm, 90%min |