B.N. PatilDineshkumar S.P.2016-11-122016-11-122011http://krishikosh.egranth.ac.in/handle/1/85238Field experiments were conducted to study the “Nitrogen management through leaf colour chart in bread wheat [Triticum aestivum L.] and emmer wheat [Triticum dicoccum (Schrank.) Schulb.] under irrigated condition” at All India Coordinated Wheat Improvement Project, UAS, Dharwad during rabi seasons of 2008-09 and 2009-10. The treatment consisted of three levels of leaf colour chart (LCC) (<3, <4 and <5), three levels of nitrogen (10, 20 and 30 kg/ha per topdressing), two method of application (with basal and without basal) and two controls (Recommended dose of nitrogen and zero nitrogen). The experiments were laid out in Randomized Complete Block Design with factorial concept with three replications. LCC<5 based nitrogen management with top dressing @ 30 kg/ha and basal application (L3N3M1) (50.41 and 51.55 q/ha) and LCC<5 with top dressing of nitrogen @ 20 kg/ha and basal application (L3N2M1) (47.17 and 48.62 q/ha) recorded significantly higher yield in both the types of wheat as compared to other treatment combinations including two controls (RDN and Zero nitrogen). Data on straw yield also varied similarly as that of grain yield. Growth parameters, yield attributes and quality traits were significantly higher under L3N3M1 and L3N2M1 in both types of wheat. LCC<4 recorded significantly higher nitrogen use efficiency (NUE) in both types of wheat. Significantly higher gross income (`64883/ha, `61319/ha in bread and `92781/ha, `87510/ha in emmer wheat), net income (`41745/ha, `38728/ha in bread and `70008/ha, `65040/ha in emmer wheat) and B:C ratio (2.83, 2.72 in bread and 4.09, 3.90 in emmer wheat) were accounted with L3N3M1 and L3N2M1, respectively. LCC levels showed significant and positive correlation with SPAD values at all the growth stages. Among different spectral indices, RVI at 60 and 75 DAS were found to be the best indicator for yield prediction using linear regression model in bread and emmer wheat, respectively.AgronomyThesis