Urea provides 46% nitrogen while the atmosphere contains 78% nitrogen. This nitrogen in the atmosphere is made available to the plants by Rhizobium bacteria in pulse crops and Azotobacter bacteria in other crops. The phosphorus in DAP, Single Super Phosphate fertilizers is unattainable for the plants. PSB bacteria makes this phosphorus available to the plants.

Types of bacterial culture

• Azotobacter culture- Oilseed crops like rapeseeds, sesame and cereals like wheat, paddy, maize etc.

• Rhizobium culture- Useful for pulse crops like urad, mung, groundnut, guar, soybean etc.

• PSB culture – Useful for all types of crops.

Method of seed treatment with bacterial fertilizer (culture) 

• To treat the seed required for one acre with culture, make a solution by heating 100 grams of jaggery and water as required. When the solution cools, add 250 grams of bacterial fertilizer to it. Coat the seeds with the solution in an even layer. Sow the seeds after drying them in the shade.

Precautions

• Use the appropriate culture for the crop.

• Keep the culture packet in a cool and well-shaded place.

• Mix culture before the last use/ expiry date.

• Add the culture only when the jaggery solution cools down.

• Dry the treated seed in shade and do not sow the seeds by mixing it with fertilizers.

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