Tác giả: Laurence Bates

Humic acids (HA) make up an important component of soil humus related to the maintenance of soil water-holding capacity, stabilization of soil structure and fertility and vital activity of soil micro …

This book studies the habitat, behavior and diseases related to ducks. Topics include the origin and genetics of domestic ducks; bornaviruses in North American waterfowl; recent viral diseases of Jap …