1Krishi Gyan Kendra, Jaunpur, N.D. University of Agriculture and Technology, Narendra Nagar, Faizabad.
2G.B. Pant University of Agriculture and Technology, Pantnagar, Nainital.
Physiological evaluation of potato cultures revealed significant differences in the leaf area, leaf area index, specific leaf area (SLA), relative growth rate (RGR) and net assimilation rate (NAR) of potato cultures studied under Pantnagar (Nainital) conditions. All these characters varied with cultures and showed a decreasing trend with time in all the cultures. The magnitude of decline also differed from culture to culture. Leaf area and leaf area index reached their maximum at 60 days stage in Kufri Badshah in both the years. SLA, RGR and NAR were comparatively higher in Kufri Dewa at different stages than in other cultures.
Cultures like JH 222, JF 27 and Kufri Badshah, which developed optimum leaf area and leaf area index at early stages, also yielded more than those which had higher leaf area index at later stage like Kufri Sindhuri.
