Monday, March 17, 2008

Soil Quality; organic versus conventional farming

by: ikhsan hasibuan

There are some differences in soil quality between organic and conventional farming due to some restrictions in organic farming. organic farming aims to improve quality of crop yield through improving soil quality by using no chemical fertilizer and pesticide that can harm beneficial underground and aboveground organisms

ORGANIC SOIL QUALITY

  • contains no pesticide residues, due to no pesticide applied
  • low NO3 and P2O5 contents due to no chemical fertilizer, manure used containt lower N and P compared with chemical fertilizer
  • adding manure improves organic matter content
  • also improves soil structure since high fiber content in manure
  • higher microbial diversity and activity. manure gives good environment for microorganism to live in soil
  • higher microfauna diversity and number
  • suppresiveness to root disease, due to diversity of microorganism in soil within the beneficial and non-beneficial that interact each other.
CONVENTIONAL SOIL QUALITY
  • containt pesticide residue, due to large used of chemical fertilizer and pesticide
  • used of chemical fertilizer increase NO3 and P2O5 content in soil
  • chemical fertiliser and pesticide used give bad impact to soil structure since it has no fiber content
  • lower microbial diversity and activity, chemical fertilizer and pesticide can harm the beneficial organisms and make unbalanced benefial-nonbeneficial organism
  • lower microfauna diversity and number
  • conducive to root disease

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