Measurement Significance: Ammonium nitrogen in the soil can be adsorbed by the soil colloid, which is exchanging ammonium state nitrogen fertilizer, and can be dissolved in the soil solution, which can be directlyThe use of plant absorption is a fast-acting nitrogen.\u0026 nbsp;
As determined: Ammonium nitrogen in soil is in a strong alkaline medium and hypochlorite and phenol, producing water-soluble dye indwell blue, with a characteristic absorption peak at 625 nmThe absorbance value is proportional to the ammonity nitrogen content.\u0026 nbsp;
Agents and instruments: balance, normal temperature centrifuge, visible spectrophotometer, 1 ml glass cuvette, oscillator.\u0026 nbsp;

Cartpieces

• 
• 4

  4Delete

• 
• 4

  4Delete

• 
• A

  ADelete

• 
• S

  SDelete

• 
• +

  +Delete

• 
• 1

  1Delete

• Delete

• Delete

• 
• 1

  1Delete

• 
• 1

  1Delete

• 
• $

  $Delete

• 
• 0

  0Delete

• 
• 2

  2Delete

• 
• $

  $Delete

• 
• 0

  0Delete

• 
• 0

  0Delete

• 
• 1

  1Delete

• 
• S

  SDelete

• 
• �

  �Delete

• 
• <

  <Delete

• 
• i

  iDelete

• 
• i

  iDelete

• Delete

• 
• 1

  1Delete

• Delete

• 
• 1

  1Delete

• 
• 1

  1Delete

• 
• 0

  0Delete

• Delete

• 
• 2

  2Delete

• 
• 1

  1Delete

• 
• 0

  0Delete

• 
• 0

  0Delete

• 
• 0

  0Delete

• 
• 0

  0Delete

• 
• 0

  0Delete

• 
• 0

  0Delete

• 
• 1

  1Delete

• 
• 1

  1Delete

• Delete

• 
• -

  -Delete

• 
• -

  -Delete

• 
• 0

  0Delete

• Delete

• 
• t

  tDelete

• 
• 0

  0Delete

• 
• 0

  0Delete

• 
• 0

  0Delete

• 
• f

  fDelete

• Delete

• Delete

• Delete

• Delete

• Delete

• Delete

• Delete

• Delete

• Delete

• Delete

• Delete

• Delete

• Delete

• Delete

• 
• 2

  2Delete

• 
• $

  $Delete

• Delete

• 
• 0

  0Delete

• Delete

• Delete

• Delete

• 
• S

  SDelete

• 
• 4

  4Delete

• 
• A

  ADelete

Totalgoods,subtotals:￥Checkout