shodhganga.inflibnet.ac.inshodhganga.inflibnet.ac.in/bitstream/10603/13492/11/11...availa le in...
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shodhganga.inflibnet.ac.inshodhganga.inflibnet.ac.in/bitstream/10603/13492/11/11...availa le in abundant quantity in the nature, but it is not available directly to the plant. There