Author(s):

P Venkata Subbaiah

Abstract: A pot culture experiment was conducted to study the effect of integrated use of organic and inorganic sources of nutrients and biofertilizers on Maize and their residual and cumulative effects on sequence Rabi crop Onion. The results revealed that application of 75% RDF along with 25% N or P substituted through vermicompost or poultry manure with addition of azotobacter or phosphorus solubilising bacteria improved the drymatter production, nutrient content and soil availability of N, P₂O5, K₂O & S over the control and other inorganic treatments. Where as in rabi onion grown in two different situations like fertilized and unfertilized to know the cumulative and residual effect of kharif maize treatments on subsequent rabi onion crop. The results revealed that, growth and nutrient content of fertilized onion is more on integrated nutrient treated pots. The soil available N, P₂O5, K₂O & S after harvest of onion is more in fertilized pots than unfertilized pots.

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