Int.J.Curr.Microbiol.App.Sci (2020) 9(12): 2952-2962 2952 Original Research Article https://doi.org/10.20546/ijcmas.2020.912.350 Response of Mode of Application with Integrated Nutrient Management on Soil Parameters of Isabgol (Plantago ovata Forsk.) under Northern Dry Zone of Karnataka Siddalingayya V. Salimath * , K. N. Kattimani, Y. K. Kotikal, N. S. Nagarja, Jameel Jhalegar, D. R. Patil and J. Venkatesh College of Horticulture, Bagalkot, University of Horticultural Sciences, Bagalkot, India *Corresponding author ABSTRACT Introduction In India, Isabgol occupies an area of 80,000 ha with the total production of 45,000 tonnes and productivity of 0.56 MT ha -1 . India is the only country with monopoly in Isabgol production and marketing in the international trade. Thus, with average export volume of 29,000 MT and it earns on an average of ₹ 520 crores annually which contribute to about 80 per cent of the Psyllium traded in the world market. So, it is called as dollar earning medicinal plant of India. Among all the countries in the world, the United States of America is the single major buyer of Psyllium husk from India, accounting for about 75 per cent of the total exports of the material from India (Goraya and Ved, 2019) with annual trade of more than 60,000 MT. In Karnataka, Isabgol cultivation is very meager and only local cultivars are grown with poor yield. There is also wide yield gap between local cultivars hence high yielding Isabgol varieties used in this research. Performance of any crop or variety depends International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 9 Number 12 (2020) Journal homepage: http://www.ijcmas.com The field research trial was conducted to evaluate the two Isabgol varieties with INM in northern dry zone of Karnataka during two years 2015 and 2016. The experiment was laid out in split plot design (SPD) with sixteen INM treatment combinations at the college of horticulture, bagalkot. Analysis of both years and pooled data exhibited more value was Vallabh Isabgol-1 in soil parameters viz., EC (dSm -1 0.28), pH (8.26) and OC (1.78), available NPK (263.12, 34.63, 264.84 kg ha -1 ), Uptake N P K (1 : 0.34 : 0.72 %) as compared to Gujarat Isabgol-2. Whereas the higher values with INM treatments with respect to plant growth and development were observed in Viz. N 11 -75 % RD of FYM (7.5 t ha -1 ) + 75% RD of NPK (37.5:18.75:22.50 kg ha -1 ) +Azospirillum (5kg ha -1 ) + PSB (3kg ha -1 ) + ZnSO 4 (15 kg ha -1 ) + FeSO 4 (7.5 kg ha -1 ) and EC, pH and OC (8.25,0.27,1.90), Available NPK (279.62:39.90:286.49 Kg ha -1 ), Uptake N P K (1.25:0.44:0.95 %). Higher values for interaction effect on growth and yield parameters were recorded in V 1 N 11. viz seed yield (15.50 q ha -1 ) husk yield (5.45q ha -1 ). Keywords Gujarat Isabgol-2, INM, Vallabh Isabgol-1 Accepted: 18 November 2020 Available Online: 10 December 2020 Article Info