and R. Dahiya
Department of Soil Science,
CCS Haryana Agricultural University,
Hisar-125 004, India
*Corresponding Author Email :
community has an integral role in farming, but there is limited understanding
of the complex response of microbial populations to organic and conventional
farming systems. Therefore, the present study was carried out to study the
effect of organic and conventional farming practices on soil microbial
population in Haryana.
Methodology: Fifty surface
soil samples (0-15 cm) were collected from organic and their adjoining
conventional farms at 11 districts of Haryana. Soil samples were processed
and analyzed for Rhizobium, Azotobacter, Azospirillium
and phosphorous solubilizing bacterial (PSB) counts for the two types of
Results: In comparison to
conventional farming system, overall, population of PSB (which was 25.71×104
CFU g-1 soil) increased significantly to 36.91×104 CFU g-1
soil (an increase of 43.5%). Similarily, Rhizobium population in
organic farming system increased from 29.26×104 CFU g-1
soil to 42.14×104 CFU g-1 soil (an increase of 44.1%).
The population of Azotobacter increased significantly from 15.83×104
to 22.01×104 CFU g-1 soil (39.0%), while Azospirillium
population increased from 13.66×104 to 20.10×104 CFU g-1
with an increase of 47.1%. Thus, it is clear from the results that organic
nutrient sources showed a stimulating influence on the microbial populations
of organic farming.
Interpretation: Higher microbial
population recorded in organic farming in comparison to conventional farming
leads to better soil health and increased productivity.
Azospirillium, Azotobacter, Conventional farming system, Organic nutrients, Rhizobium
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