Seed Production of Vegetable, Tuber and Spice Crops (2+1)

3. Magnetic Separator

• The magnetic separator separates seed according to its surface texture or related seed characteristics.
  
• First, seed is treated with iron filings, which adhere to rough surface alone.
  
• The treated seed lot is passed over a revolving magnetic drum and separated from smooth, uncoated seed.
  
• It may help to add varied amounts of water while mixing seed and powder, depending on the seed type.
  
• At any rate , the effectiveness of magnetic separation depends on the components of the seed lot and on the powder and water used in the treating operation.
  
• The greater the difference between surface textures of the seed lot’s components, more effective will be the separation.