Agricultural Research Station, Kathalagere, University of Agricultural Sciences, Bangalore - 560 065, India.
The field experiments were carried out during kharif, 2005 and summer, 2006 to know the physiological and agronomic efficiency of nitrogen in rice as influenced by sources of nitrogen and crop establishment techniques. The SRI establishment technique recorded significantly higher physiological efficiency (53.36, 54.18 and 53.77 kg grain kg−1 N uptake) and agronomic efficiency (67.07, 55.47 and 61.27 kg grain kg−1 N) of nitrogen in kharif, summer and pooled analysis, respectively. Among the sources of nitrogen, application of large sized urea granules recorded higher physiological efficiency (52.83, 53.25 and 52.99 kg grain kg−1 N uptake) and agronomic efficiency (60.53, 48.27 and 54.40 kg grain kg−1 N) of nitrogen in kharif, summer and pooled analysis, respectively.
