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Sarkar I.,North Bengal Agricultural University | Chakravorty S.,North Bengal Agricultural University | Chakravorty S.,Palli Siksha Bhavana Institute of Agriculture | Maitra S.,North Bengal Agricultural University
Indian Journal of Agricultural Research | Year: 2014

Thirty cultivars of gladiolus were evaluated to select the suitable cultivars for export quality flowers because the choice of cultivars is an important factor in export oriented commercial floriculture. The overall performance of cv. Jester among all the 30 cultivars were better in respect of production of largest size floret (14.42 cm). Cv. Candiman showed highest spike length (125.36 cm), more number of florets per spike (19.92), highest number of florets remaining open at a time (7.82) with maximum weight of spike (123.11 g). Cv. White Prosperity showed maximum duration of flowering (22.29 days), longest rachis length (92.28 cm) and highest field life (13.59 days) of spike on the other hand the longest vase-life (9.67 days) was observed with cv. American Beauty. Results revealed that out of 30 cultivars of gladiolus, cv. Jester, cv. Candiman, cv. White Prosperity and cv. American Beauty performed best and hence may be recommended for commercial cultivation in the North- Eastern hilly region.

Singh S.,Indian Central Salt and Marine Chemicals Research Institute | Prakash A.,Indian Central Salt and Marine Chemicals Research Institute | Chakraborty N.R.,Palli Siksha Bhavana Institute of Agriculture | Wheeler C.,General Motors | And 2 more authors.
Industrial Crops and Products | Year: 2016

Path analysis was done on different morphological, physiological and oil quality traits of 15, six-years old candidate plus trees of Jatropha curcas to assess their direct and indirect effect on oil yield. Principal component analysis was subsequently done to assess the pattern of the variations in characters and segregate the traits to distinguish parental accessions for plant improvement. Total chlorophyll had a positive direct effect on oil yield and also had indirect effect through single seed weight, single fruit weight and oil content. Male to female flower ratio had negligible direct effect on oil yield but had considerable indirect effect through seed yield per plant. Seed weight, fruit weight and seed yield plant-1 had a high direct effect on oil yield and also had indirect effect through oil content and thus found suitable for direct selection. The first five principal components contributed 75.5% of the total variability. The accessions JCN14, JCN08 and JCN09 had very high values for the first component, while JCN04 and JCN05 had lower values for all these variables. © 2016 Elsevier B.V.

Singh S.,Indian Central Salt and Marine Chemicals Research Institute | Prakash A.,Indian Central Salt and Marine Chemicals Research Institute | Chakraborty N.R.,Palli Siksha Bhavana Institute of Agriculture | Wheeler C.,General Motors | And 2 more authors.
Trees - Structure and Function | Year: 2016

Key message: Variability in traits of 15, diverse 6-year-old candidate plus trees ofJatropha curcaswas determined to identify the best gain heritable traits correlating with oil yield forJatrophaimprovement.Abstract: Study was carried out on 15 6-year-old candidate plus trees of Jatropha curcas adapted on semi-arid wasteland with an objective to assess variation in morphological, physiological and oil quality characters. Heritable and non-heritable components of the total variability of the characters were determined by genotypic (GCV) and phenotypic (PCV) co-efficient of variation, heritability and genetic advance (GA) and the best gain traits for Jatropha improvement through selection and breeding were assessed. Further, association among the traits were assessed and germplasm were separated into different clusters. Significant variation was found among the different genotypes for all the characters. The photosynthetic and transpiration rate correlated with oil content, seed and oil yield. The chlorophyll pigments correlated positively with the photosynthetic rate and oil content. The seed oil content varied considerably from 27.68 % (JCN01) to 37.49 % (JCN14) and had high heritability, but it had low PCV and GCV and moderate GA. The oil yield plant−1 had high genetic variability and varied significantly from 0.07 (JCN15) to 0.47 kg plant−1 (JCN09/IC 565733). Though the different fatty acids differed significantly with different germplasm and also had high heritability, they had low PCV, GCV and GA. Seed weight, fruit weight, seed weight fruit−1 and seed yield plant−1 strongly correlated with oil yield and had moderate to high GCV, PCV, coupled with high heritability and GA. Germplasm were separated into four distinct clusters with a maximum inter distance found between cluster II and IV, and minimum between cluster I and III. The study helped to identify the superior germplasm among diverse genotypes of J. curcas that can serve as parents with desirable characters like high oil yield, low stomatal conductance and high water use efficiency for further breeding purposes. © 2016 Springer-Verlag Berlin Heidelberg

Kumar S.,Palli Siksha Bhavana Institute of Agriculture | Maity S.K.,Palli Siksha Bhavana Institute of Agriculture | Singh A.K.,Deparment of Agronomy
Ecology, Environment and Conservation | Year: 2016

A field experiment was conducted during summer season of 2012 for generating information on growth and to workout cob and corn characteristic practices with its yield and economics in summer maize grown as bay corn (Zea mays L.). in split plot design and replicated three times. Plant height at knee high stage only increased markedly due to higher rate of basal nitrogen application resulting significantly taller plant under SPAD based nitrogen management with 75 kg N/ha basal followed by N top dressing at SPAD value at <45 (each time @ 20kg N/ha) and also dry matter production at tasselling stage were found to improved significantly under SPAD compared to blanket split of 150 kg N/ha with 3 splits. The cob number were found to be non significant whereas blanket application with higher rate of basal N application registered significant increase in young cob yield. Higher level of N application under both the N management strategies registered significantly higher number of baby corn and yield of baby corn over lower level N of application. However, total fodder yield maximum with SPAD based N management due to growth attributes like plant height improved significantly. It should be noted that though net return (Rs.154970) was maximum with the treatment higher dose of blanket application, but B: C ratio was estimate to be highest with SPAD based N application. Seed priming with GA3 did not show significant effect on growth and yield of baby corn. Economics of baby corn production with seed priming also remained unfavorable. Copyright © EM International.

Kumar M.,Indian Council of Agricultural Research | Baishya L.K.,Indian Council of Agricultural Research | Ghosh D.C.,Palli Siksha Bhavana Institute of Agriculture | Ghosh M.,Palli Siksha Bhavana Institute of Agriculture | And 2 more authors.
Journal of Plant Nutrition | Year: 2013

The experiment was conducted to study the influence of application of different proportions of farmyard manure (FYM), poultry manure (PM) and vermicompost (VC) in combination with inorganic fertilizers along with seed treatment with biofertilizers on growth and productivity of rainfed potato. The experiment was conducted in split-plot design with eight nutrient management treatments in main plots and three biofertilizers (Azotobactor, PSB and Azotobactor + PSB) treatments in subplots. Shoot number, plant height, leaf area index (LAI), dry mater accumulation, dry mater partitioning, tuber yield The results showed that fertility treatments increased tuber yield by 32-90% in 2005, 29-79% in 2006 and 32-80% in 2007 over control plots. The best treatment combination was with application of 50% RDNPK through inorganic fertilizers and 50% RDN through PM along with combination of Azotobactor + PSB. The best treatment tuber yield were recorded 229.19, 238.12 and 240.07 q ha-1 in the year 2005, 2006 and 2007 respectively. © 2013 Copyright Taylor and Francis Group, LLC.

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