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(Sponsored by Ministry of Environment, Forests and Climate Change, Government of India)

Vol.12 ISSUE 4 Oct. - Dec. 2014

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Department of Zoology, University of Madras
Chennai, India

Vol.12 ISSUE 4 Oct. - Dec. 2014 - ISSN-0974-1550

Dear Readers,




           Chemical transformation in soil, in particular nutrient recycling, involves active contributions from soil microorganisms. Certain soil microorganisms such as mycorrhizal fungi can increase the availability of mineral nutrients to plants and other soil microorganisms can increase the amount of nutrients present in the soil. Such microorganisms, which contribute to plant growth, have been termed as 'biofertilizers'. Similarly, other soil microorganisms that produce compounds for the benefit of plant health are called 'phytostimulators' and they are currently studied for possible use as microbial inoculants to improve crop yield.

           In contrast to beneficial soil microorganisms, large number of pathogenic microorganisms are routinely found in the soil infecting the plants. Due to the existence of antagonism, these pathogenic microorganisms can be controlled. Antagonism against plant pathogens usually involves competition for nutrients and/or production of inhibitory compounds such as secondary metabolites (antimicrobial metabolites and antibiotics) and extracellular enzymes. Besides, certain soil microorganisms produce compounds which stimulate the natural defence mechanisms of the plant and improve its resistance to pathogens. Collectively, these soil microorganisms have been termed 'biopesticides' and represent an emerging and important alternative (i.e. biological control) in the place of chemical pesticides for the protection of crops against certain pathogens and pests.

           In this issue, the importance of tillage on agroecosystem and soil health, nanomaterial on plants growth and microbial sustainability, antibiotic free drug and other interesting informations on microbes and soil are included.


Prof. N. Munuswamy

For further details, visit our website www.dzumenvis.nic.in www.envismadrasuniv.org

World Soil Day (Dec. 5th, 2014)

ENVIS Centre Team

Prof. N. Munuswamy

Dr. V. Krishnakumar
Scientist –D

Mr. P. Thirumurugan
Programme Officer

Mr. D. Siva Arun
Programme Asstt.

Mr. R. Ramesh
Data Entry Operator

Editorial Board
Prof. N. Munuswamy
Dr. V. Krishnakumar


Effect of tillage and no-tillage on aggregate stability, organic matter content, and microbial activity in the Babylon province, Iraq

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