كتب ذات صلة

Metabolism of organic and inorganic phosphorus: a feeding experiment using phythin and sodium phosphates.

Laboratory guide in soil bacteriology

Influence of phosphorus in feeds on the phosphorus content of egg, and the chemical character of the phosphorus compounds, ...

• The story of the soil, from the basis of absolute science and real life
  المؤلفون: Hopkins, Cyril G.
• Laboratory manual for soil fertility
  المؤلفون: Pettit, James Harvey ,  Hopkins, Cyril G.
• A biochemical study of nitrogen in certain legumes
  المؤلفون: Whiting, Albert L.

• A study of soybean varieties with reference to their use as food
  المؤلفون: Woodruff, Sybil ,  Klaas, Helen
• A study of the factors influencing the improvement of the potato
  المؤلفون: East, Edward M.
• Some important insects of Illinois shade trees and shrubs
  المؤلفون: Forbes, Stephen Alfred