Secrets of the soil /

समान संसाधन

• Basic technics in ecological farming papers presented at the 2nd international conference held by the IFOAM, Montreal, October 1-5, 1978
  प्रकाशित: (1982)
• Soil organic matter management for sustainable agriculture: a workshop held in Ubon, Thailand, 24-26 August 1994 /
  प्रकाशित: (1995)
• Soil organic matter and its role in crop production
  द्वारा: Allison, Franklin E. (Franklin Elmer), 1892-1972
  प्रकाशित: (1973)
• Towards holistic agriculture : a scientific approach /
  द्वारा: Widdowson, R. W.
  प्रकाशित: (1987)
• Ecology of soils /
  द्वारा: Volobuev, V. R.
  प्रकाशित: (1964)