NITROGEN USE EFFICIENCY IN WHEAT

Abstract

A field experiment with three sources of nitrogenous fertilizers (NH4, N03, Urea) applied at 100 kg N/ha as
broadcast, dibbled 10 ern deep and dibbled 10 em deep mixed with poultry manure at I ton/ha between 25 em part rows
of wheat. Phosphorus at 90 kg P20S and potash at 60 kg K20/ha were applied as a basal dose. Grain and straw yields
were improved significantly (5% level) due to the method of fertilizer application. Ammonium sulphate applied mixed
with poultry manure proved best combination over other sources and methods of application. Total nitrogen uptake was
maximum from ammonium sulphate followed by urea and nitrate forms where poultry manure was applied with these
sources. To meet the crop requirements applied N was supplemented from soil N to a depth of75 ern, It was concluded
that wheat uptake of nitrogen was increased and used more efficiently with deep placement (dibbling) as compared to
broadcasting.