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20053
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Author: Naresh Kumar × End date: 2009 × Start date: 2003 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Study on dehydration of ber (Zizyphus mauritiana Lamk.
    (CCSHAU, 2005) Naresh Kumar; Siddiqui, Saleem
    The present investigation was undertaken to standardize various pretreatments for dehydration of ber fruits. Fresh ripe fruits at yellow green stage were subjected to different pretreatments viz., water blanching (7 min), blanching in 0.5 % KMS solution (5 min), blanching in KMS solution (5 min) + slow freezing, NaOH blanching (5 min) and then washing with 0.5 % citric acid solution, microwave blanching and osmo-dehydration. Pretreated samples were dehydrated at 65ºC in a cabinet dryer. Dehydrated fruits were evaluated for sensory score and physico-chemical characteristics. Pretreatment KMS + slow freezing recorded better retention of ascorbic acid followed by osmo-dehydration. Nonenzymatic browning was minimum in fruits given KMS + slow freezing followed by osmo-dehydrated fruits. Rehydration ratio was not significantly affected by various pretreatments. Drying rate was faster in first six hours and then slowed down. It was maximum in fruits given NaOH + citric acid pretreatment followed by osmo-dehydrated and water blanched fruits. Dehydrated fruits having 20 % moisture content received maximum organoleptic scores. However 15 % moisture fruits, though showing a little lower organoleptic score, may show better shelf life as compared to 20 % moisture fruits. Organoleptic score was improved by all the pretreatments. Maximum scores were observed for osmo-dehydrated and KMS + slow freezed fruits.
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    ThesisItemOpen Access
    A study on radiation and thermal use efficiency in barley genotypes (Hordeum vulgare L.) under two row orientations
    (CCSHAU, 2005) Naresh Kumar; Ram Niwas
    An experiment entitled to study the “A study on radiation and thermal use efficiency in barley genotypes (Hordeum vulgare L) under two row orientations” was conducted at the research station of Department of Agricultural Meteorology, CCS HAU, Hisar during 2004-05. Four barley varieties were sown under two row orientations i.e. north-south and east-west. Radiation and thermal use efficiency by was maximum in barley cultivar BH 393 followed by BH 338, BH 75 and DWR 28. Among the row orientations, barley crop sown in north-south direction shown the maximum radiation and thermal use efficiency as compared to east-west direction. Intercepted photoynhetically active radiation increase with crop growth and was maximum in cultivar BH 393 as compared to other cultivars, among row orientations, crop sown in north south direction shown maximum intercepted photoysnethically radiation as compared to east-west direction sown crop at all the phenophases. Grain number per spike, test weight and seed yield per plant was found to be more in barley cultivars BH 393 as compared to other cultivars. Among row orientations number of grains and seed yield per plant was higher in north-south direction sown crop. Biological yield, grain yield and harvest index was higher in cultivar BH 393 as compared to others and in row orientation, north south direction sown crop shown maximum biological yield, grain yield and harvest index as compared to east-west direction sown crop. A direct linear response was observed between crop parameters
  • Thumbnail Image
    ThesisItemOpen Access
    A study on radiation and thermal use efficiency in barley genotypes (Hordeum vulgare L.) under two row orientations
    (CCSHAU, 2005) Naresh Kumar; Ram Niwas
    An experiment entitled to study the “A study on radiation and thermal use efficiency in barley genotypes (Hordeum vulgare L) under two row orientations” was conducted at the research station of Department of Agricultural Meteorology, CCS HAU, Hisar during 2004-05. Four barley varieties were sown under two row orientations i.e. north-south and east-west. Radiation and thermal use efficiency by was maximum in barley cultivar BH 393 followed by BH 338, BH 75 and DWR 28. Among the row orientations, barley crop sown in north-south direction shown the maximum radiation and thermal use efficiency as compared to east-west direction. Intercepted photoynhetically active radiation increase with crop growth and was maximum in cultivar BH 393 as compared to other cultivars, among row orientations, crop sown in north south direction shown maximum intercepted photoysnethically radiation as compared to east-west direction sown crop at all the phenophases. Grain number per spike, test weight and seed yield per plant was found to be more in barley cultivars BH 393 as compared to other cultivars. Among row orientations number of grains and seed yield per plant was higher in north-south direction sown crop. Biological yield, grain yield and harvest index was higher in cultivar BH 393 as compared to others and in row orientation, north south direction sown crop shown maximum biological yield, grain yield and harvest index as compared to east-west direction sown crop. A direct linear response was observed between crop parameters (LAI, dry biomass yield) with agrometerological indices (IPAR, HU, TIR, PTU, RUE, HUE)