This document specifies the sodium hydroxide fusion method for the determination of total phosphorus, total potassium and fluoride in soil. This document is applicable to the determination of total phosphorus, total potassium and fluoride in soil.
T/NAIA 0280-2024 history
2024T/NAIA 0280-2024 Determination of total phosphorus, total potassium and fluoride in soil sodium hydroxide fusion method