Sheldon, Richard P.
Search for and development of undiscovered phosphate resources in Southeast Asia Richard P. Sheldon - 1983 - 55 p. ill. 30 cm
Includes bibliographical references
The countries of the humid tropical areas of the world lack the soill fertility necessary for high agricultural productivity, although water and sunlight are abundant.
Minerals
Search for and development of undiscovered phosphate resources in Southeast Asia Richard P. Sheldon - 1983 - 55 p. ill. 30 cm
Includes bibliographical references
The countries of the humid tropical areas of the world lack the soill fertility necessary for high agricultural productivity, although water and sunlight are abundant.
Minerals