كتب ذات صلة

The relation of plant succession to crop production, a contribution to crop ecology.

Diversified farming in the cotton belt

Continuous cropping and tillage dairy farming for small farmers

The importance of rotations in tobacco culture

• The Rothamsted experiments : being an account of some of the results of the agricultural investigations, conducted at Rothamsted in the field, the feeding shed, and the laboratory over a period of fifty years.
  المؤلفون: Lawes, J. B.
• On the sources of the nitrogen of vegetation with special reference to the question whether plants assimilate free or uncombined nitrogen.
  المؤلفون: Lawes, J. B. ,  Gilbert, Joseph Henry
• Determinations of nitrogen in the soils of some of the experimental fields at Rothamsted and the bearing of the results on the question of the sources of the nitrogen of our crops
  المؤلفون: Lawes, J. B. ,  Gilbert, J. H.