Potassium is one of the key elements for life on earth. It is required in large quantities by all plants and animals and is obtained by plants from the soil in which they grow. Animals obtain their potassium from plants, either directly or by eating other animals (and animal products) which have fed on plants.
This booklet (in Chinese) summarizes the main issues related to potash fertilizers, with following topics discussed:
How much potassium is needed by humans?
How much potassium is needed by plants?
Potassium deficiency and its symptoms
Potassium in the soil
Potassium production and reserves
Potassium and the environment
Potash fertilizers
The booklet also contains a large newly drawn schematics on "Potassium in Soil and Plant Systems" and a few color pictures.
This publication is available for download from this page, or can be ordered free of charge from Dr. Tian Yougou, NATESC, Ministry of Agriculture, China.
