FprCEN/TS 17779-2021 Organo-mineral fertilizers - Extraction of phosphorus, which is soluble in neutral ammonium citrate (NAC) for subsequent determination of P by ICP-AES
2021FprCEN/TS 17779-2021 Organo-mineral fertilizers - Extraction of phosphorus, which is soluble in neutral ammonium citrate (NAC) for subsequent determination of P by ICP-AES