Authors:
D. Das G. B. Pant University of Agriculture and Technology Department of Soil Science Pantnagar India

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Nand Ram G. B. Pant University of Agriculture and Technology Department of Soil Science Pantnagar India

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The properties of humic (HA) and fulvic acids (FA) isolated from a 27-year-old long-term experiment with rice-wheat-cowpea on a Mollisol in northern India were evaluated for elemental composition and functional groups. As compared to fallow, C, H and N decreased, while O increased in the control, but the use of NPK+FYM over the years enhanced the C and N of humic substances. The carboxylic (-COOH) and phenolic-OH groups declined in the control, but improved with NPK+FYM in comparison to fallow. Carboxylic groups (-COOH) contributed about 2–3 times more in HA and 4–5 times more in FA than the respective phenolic-OH groups to the molecular weights of these fractions of soil organic matter. The results suggested the role of integrated nutrient management in maintaining active soil humus over the years.

  • Campbell, C. A., Zentner, R. P. (1993): Soil organic matter as influenced by crop rotations and fertilization. Soil Sci. Soc. Am. J. , 57 , 1034–1040.

    Zentner R. P. , 'Soil organic matter as influenced by crop rotations and fertilization ' (1993 ) 57 Soil Sci. Soc. Am. J. : 1034 -1040 .

    • Search Google Scholar
  • Chen, Y., Senesi, N., Schnitzer, M. (1977): Information provided on humic substances by E 4 /E 6 ratios. Soil Sci. Soc. Am. J. , 41 , 352–358.

    Schnitzer M. , 'Information provided on humic substances by E4/E6 ratios ' (1977 ) 41 Soil Sci. Soc. Am. J. : 352 -358 .

    • Search Google Scholar
  • Das, D. K., Nand Ram (2006): The nature of humic substances under long-term manuring and fertilization in a rice-wheat system. Int. Rice Res. Notes , 31 (1), 29–31.

    Ram N. , 'The nature of humic substances under long-term manuring and fertilization in a rice-wheat system ' (2006 ) 31 Int. Rice Res. Notes : 29 -31 .

    • Search Google Scholar
  • Flaig, W., Beutelspacher, H., Reitz, E. (1975): Chemical composition and physical properties of humic substances. pp. 168–174. In: Giesking, J. E. (ed.), Soil Components Vol. 1. Organic Components . Springer-Verlag, New York.

    Reitz E. , '', in Soil Components Vol. 1. Organic Components , (1975 ) -.

  • Gonet, S. S., Wegner, K. (1993): Effect of long-term mineral and organic fertilizer application on properties of soil humic acids. Zes. Nar. H. Koll. Zes. Nauk. (Krakow) , 37 , 51–63.

    Wegner K. , 'Effect of long-term mineral and organic fertilizer application on properties of soil humic acids ' (1993 ) 37 Zes. Nar. H. Koll. Zes. Nauk. (Krakow) : 51 -63 .

    • Search Google Scholar
  • Govi, M., Francioso, O., Ciavatta, C., Sequi, P. (1992): Influence of long-term residue and fertilizer application on soil humic substances. A study by electro focusing. Soil Sci. , 154 , 8–13.

    Sequi P. , 'Influence of long-term residue and fertilizer application on soil humic substances. A study by electro focusing ' (1992 ) 154 Soil Sci. : 8 -13 .

    • Search Google Scholar
  • Kononova, M. M. (1966): Soil Organic Matter, its Nature, its Role in Soil Formation and Soil Fertility . Pergamon Press, Oxford, London.

    Kononova M. M. , '', in Soil Organic Matter, its Nature, its Role in Soil Formation and Soil Fertility , (1966 ) -.

  • Nand Ram (1995): Long-term effects of fertilizers on crop production and soil properties on a mollisol. Tech. Res. Bull. 124 . Directorate of Experiment Station, G. B. Pant University of Agriculture and Technology, Pantnagar, India.

    Ram N. , '', in Tech. Res. Bull. 124 , (1995 ) -.

  • Nand Ram, Raman, K. V. (1981): Characterization of humic and fulvic acids extracted from different Indian soils. J. Indian Soc. Soil Sci. , 29 , 179–183.

    Raman K. V. , 'Characterization of humic and fulvic acids extracted from different Indian soils ' (1981 ) 29 J. Indian Soc. Soil Sci. : 179 -183 .

    • Search Google Scholar
  • Nand Ram, Raman, K. V. (1984): Stability constants of complexes of metals with humic and fulvic acids under non-acid conditions. Z. Pflanzenern. Bodenkunde , 147 , 171–176.

    Raman K. V. , 'Stability constants of complexes of metals with humic and fulvic acids under non-acid conditions ' (1984 ) 147 Z. Pflanzenern. Bodenkunde : 171 -176 .

    • Search Google Scholar
  • Rautela, L. M. S., Nand Ram (2000): Characterization of humic substances isolated from organic farm wastes. Acta Agron. Ovariensis , 49 , 95–100.

    Ram N. , 'Characterization of humic substances isolated from organic farm wastes ' (2000 ) 49 Acta Agron. Ovariensis : 95 -100 .

    • Search Google Scholar
  • Schnitzer, M. (1991): Soil organic matter — The next 75 years. Soil Sci. , 151 , 41–58.

    Schnitzer M. , 'Soil organic matter — The next 75 years ' (1991 ) 151 Soil Sci. : 41 -58 .

    • Search Google Scholar
  • Schnitzer, M., Desjardins, J. G. (1962): Molecular and equivalent weights of organic matter of podzol. Soil Sci. Soc. Am. Proc. , 26 , 362–365.

    Desjardins J. G. , 'Molecular and equivalent weights of organic matter of podzol ' (1962 ) 26 Soil Sci. Soc. Am. Proc. : 362 -365 .

    • Search Google Scholar
  • Schnitzer, M., Gupta, U. C. (1965): Determination of acidity in soil organic matter. Soil Sci. Soc. Am. Proc. , 29 , 274–277.

    Gupta U. C. , 'Determination of acidity in soil organic matter ' (1965 ) 29 Soil Sci. Soc. Am. Proc. : 274 -277 .

    • Search Google Scholar
  • Skjemstad, J. O., Dalal, R. C., Baron, P. F. (1986): Spectroscopic investigations of cultivation effects on organic matter of vertisols. Soil Sci. Soc. Am. J. , 50 , 354–359.

    Baron P. F. , 'Spectroscopic investigations of cultivation effects on organic matter of vertisols ' (1986 ) 50 Soil Sci. Soc. Am. J. : 354 -359 .

    • Search Google Scholar
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Acta Agronomica Hungarica
Language English
Russian
German
French
Size  
Year of
Foundation
1950
Publication
Programme
ceased
Volumes
per Year
 
Issues
per Year
 
Founder Magyar Tudományos Akadémia   
Founder's
Address
H-1051 Budapest, Hungary, Széchenyi István tér 9.
Publisher Akadémiai Kiadó
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0238-0161 (Print)
ISSN 1588-2527 (Online)

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