Humus acids of soils

Míreanna Comhchosúla

• Humus acids of soils /
  le: Orlov, D. S.
  Foilsithe: (1985)
• Physical and chemical characteristics of aquatic humus /
  le: Gjessing, Egil T.
  Foilsithe: (1976)
• Soil Chemistry
  le: Orlone, D.S
  Foilsithe: (1992)
• Soil organic matter in sustainable agriculture
  le: Magdoff, Fred; Editor, et al.
  Foilsithe: (2004)
• Fertilizer additives and soil conditioners
  le: Ranney, M.William
  Foilsithe: (1978)