كتب ذات صلة

Studies on ammonification in soils by pure cultures

Soils of the eastern United States and their use-- XXXVIII. Muck and peat.

Nitrogen fixation by yeasts and other fungi by Charles B. Lipman ...

Soils of the eastern United States and their use-- XXXVIII. Muck and peat.

• The spirit of the soil or, An account of nitrogen fixation in the soil by bacteria and of the production of auximones in bacterized peat
  المؤلفون: Knox, Gordon Daniell.

• The human side of trees, wonders of the tree world.
  المؤلفون: Dixon, Royal. ,  Fitch, Franklin Everett
• The house fly, disease carrier an account of its dangerous activities and of the means of destroying it.
  المؤلفون: Howard, L. O.
• A guide to the wild flowers
  المؤلفون: Lounsberry, Alice. ,  Rowan, Marian Ellis Ryan