15N RECOVERY OF SORGHUM IN A RED SANDY SOIL

A. RATIINASAMY and T.S. MANICKAM

doi:https://doi.org/10.29321/MAJ.10.A00639

Madras Agricultural Journal

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15N RECOVERY OF SORGHUM IN A RED SANDY SOIL

Author: A. RATIINASAMY and T.S. MANICKAM,

p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 86, Issue: jul-sep,

DOI:https://doi.org/10.29321/MAJ.10.A00639

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Abstract

A field experiment was conducted to study the N recovery of sorghum, Co.25. in a red sandy soil (Typic Haplustalf) at the Millet Breeding Station of Tamil Nadu Agricultural University. Coimbatore. The total N recovered by the sorghum was very" less. The FUE calculated based on the total N recovery was 21.62 percent after havest. A negative N balance was obtained at the end of each physiological stage. The amount of N unaccounted at the end of crop period was 25.81 kg ha-1.

Keywords: Labeled urea, 'N recovery, Mass spectrometer. N-balance, Fertilizer use efficiency

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