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Papers by SHAMBHU SINGH

Research paper thumbnail of Fuelwood value index in components of ten tree species of arid region in India

Industrial Crops and Products, 1994

Calorific values of six indigenous species and four exotics were determined for components such a... more Calorific values of six indigenous species and four exotics were determined for components such as stump, main stem, tree top, branches, foliage and bark. Tree species selected were: Acacia nilotica, Azadirachta indica, Casuarina equisetifolia, Dalbergia sissoo, Prosopis cineraria, Zizyphus mautitiana (all indigenous); Acacia auriculifonnis, A. tortilis, Eucalyptus camaldulensis and E. tereticomti (all exotics). Studies indicated that indigenous tree species are better suited as fuelwood species as they contain high-density wood, low ash content and low nitrogen percentage. The most promising species were A. nilotica, C. equisetifolia and Z. mauritiana. The tree components among the groups (indigenous and exotics) and within the species differed very significantly (P < 0.01) in calorific values. The calorific means ranged from 18.7 to 21.77 MJ/kg for the indigenous tree species, and 16.3 to 20.0 MJ/kg for the exotic tree species. The fuelwood value index (FVI) was also worked out, taking into account the calorific value and density of the wood as positive characteristics, and high water content and high ash content as negative characteristics. It was observed that the FVI of the indigenous tree species was high.

Research paper thumbnail of Vibrational spectra and assignments of 1-halonaphthalenes

Spectrochimica Acta Part A: Molecular Spectroscopy, 1978

The i.r. and Raman spectra of 1-halonaphthalenes have been measured in the spectral regions 4000-... more The i.r. and Raman spectra of 1-halonaphthalenes have been measured in the spectral regions 4000-250cm-* and 3200-lOOcm_ respectively, along with the depolarization ratio of the Raman lines.

Research paper thumbnail of Carbon-13 splittings of proton and fluorine resonance spectra in substituted fluorobenzenes

Journal of Magnetic Resonance (1969), 1974

ABSTRACT

Research paper thumbnail of Forbidden character in electronic spectra of mono-halonaphthalenes

Journal of Molecular Spectroscopy, 1977

The singlet-singlet absorption and emission spectra of alpha-fluoro and the absorption spectra of... more The singlet-singlet absorption and emission spectra of alpha-fluoro and the absorption spectra of alpha-chloro-, alpha-iodo-, and beta-bromo-naphthalenes have been photographed and analyzed. The absorption spectra of all the four molecules show the presence of two discrete systems of bands, and the emission spectrum of alpha-fluoronaphthalene corresponds to the longer-wavelength system of absorption. With the alpha-chloro- and alpha-iodo-naphthalenes, the longer-wavelength system

Research paper thumbnail of Near Ultraviolet Absorption Spectra of α-Bromo and β-Chloronaphthalene

Spectroscopy Letters, 1975

Page 1. SPECTROSCOPY LETTERS, 8(1), 7-23 (1975) NEAR ULTRAVIOLET AUSORPTION SPECTRA OFN -BROHO AN... more Page 1. SPECTROSCOPY LETTERS, 8(1), 7-23 (1975) NEAR ULTRAVIOLET AUSORPTION SPECTRA OFN -BROHO AND p -CrlLORCNAPHTHiiLENE by S~AKLHU N.SINGH, OPSHAWA-&amp; RDSI?GH Physics Cepartment, Kurukshetra IJniverqity, Kurukshetra (INDIA) ...

Research paper thumbnail of Growth and productivity of crops in association with an Acacia nilotica tree belt

Journal of Arid Environments, 1994

Research paper thumbnail of Influence of multipurpose trees on agricultural crops in arid regions of Haryana, India

Journal of Arid Environments, 1995

The effects of multipurpose trees on the productivity of agricultural crops were studied in the a... more The effects of multipurpose trees on the productivity of agricultural crops were studied in the arid regions of Haryana. In one of the experiments, wheat was grown on irrigated farms having scattered trees ofDalbergia sissoo, Azadirachta indica, Prosopis cinerariaandAcacia nilotica. Data of wheat yield for each tree species at different distances (1, 3, 5, and 7 m) and four directions

Research paper thumbnail of Biomass production and distribution of roots in three stands of Populus deltoides

Forest Ecology and Management, 1994

... 65 (1994) 135-147 Biomass production and distribution of roots in three stands of Populus del... more ... 65 (1994) 135-147 Biomass production and distribution of roots in three stands of Populus deltoides Sunil Puri*, Virendra Singh, Bharat Bhushan, Shambhu Singh ... The effects of bush clearing and rainfall viability on grass yield and composition in south-west Zimbabwe. ...

Research paper thumbnail of Fuelwood value index in components of ten tree species of arid region in India

Industrial Crops and Products, 1994

Calorific values of six indigenous species and four exotics were determined for components such a... more Calorific values of six indigenous species and four exotics were determined for components such as stump, main stem, tree top, branches, foliage and bark. Tree species selected were: Acacia nilotica, Azadirachta indica, Casuarina equisetifolia, Dalbergia sissoo, Prosopis cineraria, Zizyphus mautitiana (all indigenous); Acacia auriculifonnis, A. tortilis, Eucalyptus camaldulensis and E. tereticomti (all exotics). Studies indicated that indigenous tree species are better suited as fuelwood species as they contain high-density wood, low ash content and low nitrogen percentage. The most promising species were A. nilotica, C. equisetifolia and Z. mauritiana. The tree components among the groups (indigenous and exotics) and within the species differed very significantly (P < 0.01) in calorific values. The calorific means ranged from 18.7 to 21.77 MJ/kg for the indigenous tree species, and 16.3 to 20.0 MJ/kg for the exotic tree species. The fuelwood value index (FVI) was also worked out, taking into account the calorific value and density of the wood as positive characteristics, and high water content and high ash content as negative characteristics. It was observed that the FVI of the indigenous tree species was high.

Research paper thumbnail of Vibrational spectra and assignments of 1-halonaphthalenes

Spectrochimica Acta Part A: Molecular Spectroscopy, 1978

The i.r. and Raman spectra of 1-halonaphthalenes have been measured in the spectral regions 4000-... more The i.r. and Raman spectra of 1-halonaphthalenes have been measured in the spectral regions 4000-250cm-* and 3200-lOOcm_ respectively, along with the depolarization ratio of the Raman lines.

Research paper thumbnail of Carbon-13 splittings of proton and fluorine resonance spectra in substituted fluorobenzenes

Journal of Magnetic Resonance (1969), 1974

ABSTRACT

Research paper thumbnail of Forbidden character in electronic spectra of mono-halonaphthalenes

Journal of Molecular Spectroscopy, 1977

The singlet-singlet absorption and emission spectra of alpha-fluoro and the absorption spectra of... more The singlet-singlet absorption and emission spectra of alpha-fluoro and the absorption spectra of alpha-chloro-, alpha-iodo-, and beta-bromo-naphthalenes have been photographed and analyzed. The absorption spectra of all the four molecules show the presence of two discrete systems of bands, and the emission spectrum of alpha-fluoronaphthalene corresponds to the longer-wavelength system of absorption. With the alpha-chloro- and alpha-iodo-naphthalenes, the longer-wavelength system

Research paper thumbnail of Near Ultraviolet Absorption Spectra of α-Bromo and β-Chloronaphthalene

Spectroscopy Letters, 1975

Page 1. SPECTROSCOPY LETTERS, 8(1), 7-23 (1975) NEAR ULTRAVIOLET AUSORPTION SPECTRA OFN -BROHO AN... more Page 1. SPECTROSCOPY LETTERS, 8(1), 7-23 (1975) NEAR ULTRAVIOLET AUSORPTION SPECTRA OFN -BROHO AND p -CrlLORCNAPHTHiiLENE by S~AKLHU N.SINGH, OPSHAWA-&amp; RDSI?GH Physics Cepartment, Kurukshetra IJniverqity, Kurukshetra (INDIA) ...

Research paper thumbnail of Growth and productivity of crops in association with an Acacia nilotica tree belt

Journal of Arid Environments, 1994

Research paper thumbnail of Influence of multipurpose trees on agricultural crops in arid regions of Haryana, India

Journal of Arid Environments, 1995

The effects of multipurpose trees on the productivity of agricultural crops were studied in the a... more The effects of multipurpose trees on the productivity of agricultural crops were studied in the arid regions of Haryana. In one of the experiments, wheat was grown on irrigated farms having scattered trees ofDalbergia sissoo, Azadirachta indica, Prosopis cinerariaandAcacia nilotica. Data of wheat yield for each tree species at different distances (1, 3, 5, and 7 m) and four directions

Research paper thumbnail of Biomass production and distribution of roots in three stands of Populus deltoides

Forest Ecology and Management, 1994

... 65 (1994) 135-147 Biomass production and distribution of roots in three stands of Populus del... more ... 65 (1994) 135-147 Biomass production and distribution of roots in three stands of Populus deltoides Sunil Puri*, Virendra Singh, Bharat Bhushan, Shambhu Singh ... The effects of bush clearing and rainfall viability on grass yield and composition in south-west Zimbabwe. ...