Livres associés

The utility of sulphate of ammonia in agriculture.

A tribute to Levi Stockbridge, professor of agriculture in the Massachusetts agricultural college from 1871 to 1882, and president of the college from 1880 to 1882.

Talks on manures : a series of familiar and practical talks between the author and the deacon, the doctor, and other neighbors, on the whole subject of manures and fertilizers

Some observations on manuring with bone-dust.

• The story of the soil, from the basis of absolute science and real life
  Auteur(s): Hopkins, Cyril G.
• Soil bacteria and phosphates
  Auteur(s): Hopkins, Cyril G. ,  Whiting, Albert L.
• Laboratory manual for soil fertility
  Auteur(s): Pettit, James Harvey ,  Hopkins, Cyril G.