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The rice (Oryza sativa) covers largest area in total grain production in Narmada district of Gujarat. One of the major constraints of low productivity of rice is lack of newly generated technology among farmers. A total of 54 front line demonstrations were conducted during 2012 to 2013 on area of 9.0 ha with the active participation of farmers with the objective to demonstrate the latest variety technology of rice production. The percentage increase in the yield over local check was 20.4 with higher gross return of 41805 Rs./ha, net return of 29359 Rs./ha and benefit cost ratio 3.4 as compared to local check (34752 Rs./ha, 22755 Rs./ha and benefit cost ratio 2.9, respectively).

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The effects of nitrogen [75 and 150 kg (N) ha -1 ] and elevated CO 2 on growth, photosynthetic rate, contents of soluble leaf proteins and activities of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and nitrate reductase (NR) were studied on wheat (Triticum aestivum L. cv. HD-2285) grown in open top chambers under either ambient (AC) or elevated (EC) CO 2 concentration (350 ± 50, 600 ± 50 µmol mol -1 ) and analyzed at 40, 60 and 90 d after sowing. Plants grown under EC showed greater photosynthetic rate and were taller and attained greater leaf area along with higher total plant dry mass at all growth stages than those grown under AC. Total soluble and Rubisco protein contents decreased under EC but the activation of Rubisco was higher at EC with higher N supply. Nitrogen increased the NR activity whereas EC reduced it. Thus, EC causes increased growth and P N ability per unit uptake of N in wheat plants, even if N is limiting.Additional key words: nitrate reductase, protein content, Rubisco, specific leaf area, Triticum aestivum.

A field experiment was conducted during rabi season of 2011-12 on heavy black soil to study the effect of integrated nutrient management on growth and yield of baby corn. The treatments comprising all possible combinations of five levels of nitrogen (chemical and vermicompost fertilizer) with and without bio-fertilizer (Azotobacter and PSB) were laid out in randomized block design with three replications. These were significantly higher with application of 100% RDN from chemical fertilizer with bio-fertilizer over 100% RDN from vermicompost. The cob and fodder yields significantly differed with different integrated nutrient management treatment. Significantly the higher growth and yield attributes yield and fodder yield were recorded with the application of 100% RDF from chemical fertilizer with bio-fertilizer. Application of 100% RDN from chemical fertilizer with biofertilizer was recorded higher net returns over 100% RDN from vermicompost (Rs. 220775/ha) and BCR (12.54).