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- p.o. - 2 definitions, 4 abbreviations
- P/O - 1 definition, 5 abbreviations
- OP - 1 definition, 591 abbreviations
- OPS - 1 definition, 260 abbreviations
- OPE - 1 definition, 84 abbreviations
- Nitrophos by Great Soviet Encyclopedia... or nitrophosphate), a compound nitrogen-phosphorus mineral fertilizer. It contains an average of 38 percent N and P2O5. It is produced in granules consisting of a precipitate, ammonium nitrate, and gypsum or a precipitate, superphosphate, Ammophos, and ammonium nitrate obtained in a single production process by decomposition of apatite or phosphorite with a ...