DETERMINATION OF ORGANIC CARBON IN SOIL (Walkly and Blank Method)

DETERMINATION OF ORGANIC CARBON IN SOIL   (Walkly and Blank Method)

Procedure:

• Take 1.0 gm of Soil Sample in 500 ml of Conical Flask
• Add 10 ml of Potassium Dicromate of 1.0 N
• Add 20 ml of Con. H­2­ ­­­_­–­­_­­­So 4
• Remain for 30 Minutes to Digestion
• Add 200 ml of Distilled Water 
• Add 10 ml of Orthophosphoric Acid of 85 %
• Add 1.0 ml of Diphinyle Indicator
• Titrate with  Ferrus Ammonium Sulfate of 0.5 N
• Note Reading Show on Burette