STUDIES ON THE EFFECT OF COMPACTION AND GRADED DOSES OF NITROGEN ON THE AVAILABILITY OF NITROGEN AND POTASSIUM AND YIELD OF MAIZE (DECCAN)

K.K.MATHAN; R.NATESAN and B.RAJKANNAN

doi:https://doi.org/10.29321/MAJ.10.A01854

Madras Agricultural Journal

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STUDIES ON THE EFFECT OF COMPACTION AND GRADED DOSES OF NITROGEN ON THE AVAILABILITY OF NITROGEN AND POTASSIUM AND YIELD OF MAIZE (DECCAN)

Author: K.K.MATHAN, R.NATESAN and B.RAJKANNAN,

p-ISSN: 0024-9602, e-ISSN:2582-5321, Vol: 78, Issue: may-aug,

DOI:https://doi.org/10.29321/MAJ.10.A01854

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Abstract

The mobility of nitrogen and potassium in soils with sub soil compaction of bulk densities 1.5, 1.7 and 1.9 g/cc in red sandy loam soils with deccan maize as test crop was studied. The movement of nitrogen and potassium was observed to be reduced at higher bulk densities of 1.7 and 1.9 g/cc. The higher levels of nitrogen did not influence the yield of grain as well as uptake of N and K nutrients beyond an optimum bulk density of 1.7 g/cc. N at 135 kg/ha increased the yield and uptake of Nand K

Keywords: Compaction, Nitrogen, Availability to Maize

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