Rajesh KumarVijay Kumar2024-07-032024-07-031997https://krishikosh.egranth.ac.in/handle/1/5810211398The present investigation was conducted for the maximization of tuber yield in colocasia (colocasia asculenta( L) Schott) by the application of nitrogen and potassium along with suitable plant spacing. The experiment was laid out during Kharif 1996.Experience was conducted in randomized Block Design with factorial fashion, comprising of four levels each of nitrogen and potassium (0,40, 80 and 120 Kg ha-1) and two different spacing S1(60cm X 45 cm) to study the effect on growth,yield and quality of colocasia crop. Altogether, the experiment consisted of 32 treatments which were replicated twice. Eighteen plant characters were studied, including economic ,Growth attributes were recorded at 15 days interval. The significant effect of treatments were observed particularly for growth attributes in later stages. The ultimate plant height (78.90 cm), number of leaves (7.00) and leaf width (22.10cm) were recorded maximum in the treatment combination N2K1S2, while girth at the base (19.20cm) and leaf lenghth (37.40cm) were observed maximum in the treatment combination N2K1S1. Among the yield attributes number of cormels per plant (20.40) and cormel weight per plant (300.80g) were found maximum in the treatment combination N2K2S2.Finally the tuber yield per quality plot (10.80 Kg) as well as estimated tuber yield(13.33 ha t/ha) were obtained in the treatment combination N2K2S1.Dry matter percentage was recorded maximum 19.30 per cent for leaves (N3K1S2) and 26.17 percent for tubers (N2K3S2). Interaction effects of nitrogen,potassium and spacing (NxKxS) were found to be nonsignificant for most of the Characters.Interaction effects of NxS andKxS showed that the nutrients with spacing interaction significantly .So far as the economics of the trial was concerned, the treatment combination N 2K2S1 gave the maximum net return (rs. 33.042=60/ha) as well as benefit cost ration (4.74) The present investigation suggested that significant increase in growth attributes as well as yield were observed upto 80 Kg per hectare each of nitrogen and potassium application with spacing of 60x30cm.EnglishThesis