Measurement Significance: Speed Phosphorus is the phosphorus component that can be absorbed by plant in soil, including all water soluble phosphorus, partially adsorbed phosphorus and organism phosphorus, soil speed phosphorus is limited.One of the main factors of plant growth.

Measurement principle: extract alkali-soluble phosphorus and adsorbed phosphorus with a weak alkaline, and determined by molybdenum bismuth resistance.

Required instruments, supplies: balance, normal temperature centrifuge, visible spectrophotometer, 1 ml glass cuvette, oscillator.\u0026 nbsp;

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