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Zoology

Blazing goIITian

Joined:	9 Feb 2007
Post:	1015

21 Aug 2008 08:31:03 IST

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Q) Which of the folowing is correct----

1) Both Azotobacter & Rhizobium fix atmospheric N₂ in the root nodules of plants

2) Cyanobacteria as Anabaena & Nostoc are important mobilizers of phosphates & plant nutrition in soil

3) At present it is not possible to grow maize wothout chemical fertilizers

4) Extensive use of fertilizers may lead to eutrophication of nearby water bodies

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Scorching goIITian

Joined: 26 Dec 2007

Posts: 241

21 Aug 2008 12:40:14 IST

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d) Extensive use of fertilizers may lead to eutrophication of nearby water bodies

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