NITROGEN SKIPPING THROUGH DUAL CROPPING OF Azolla WITH RICE

R. THAMIZH VENDAN; G. GOPALASWAMY; S. ANTHONI RAJ; A. ABDUL KAREEM and T.B. RANGANATHAN

doi:https://doi.org/10.29321/MAJ.10.A00752

Madras Agricultural Journal

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NITROGEN SKIPPING THROUGH DUAL CROPPING OF Azolla WITH RICE

Author: R. THAMIZH VENDAN, G. GOPALASWAMY, S. ANTHONI RAJ, A. ABDUL KAREEM and T.B. RANGANATHAN,

p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 85, Issue: jul-sep,

DOI:https://doi.org/10.29321/MAJ.10.A00752

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Abstract

The possibility of skipping a top dressing of fertilizer N through the use of Azolla microphylla was studied. Inoculation of A. microphylla on 10 day after transplantation at I t ha" and incorporation at 30 DAT increased the soil organic carbon content and available N status. Skipping of the second top dressing of fertilizer N at 25 Kg ha' which coincides with Azolla trampling saves the fertilizer and labour for top dressing besides increasing the rice yield significantly at all the seasons tested.

Keywords: Azolla, N reduction, organic carbon, yield.

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