Pyongyang, April 11 (KCNA) — Teachers and researchers of Life Science Faculty of Kim Il Sung University in the Democratic People’s Republic of Korea have developed the technology to mass-produce phosphoritic organomineral fertilizer.
The fertilizer is made by processing phosphorite containing more than one percent of phosphorus by a biological method.
The amounts of phosphorus and other macroelements of phosphorite are 1.7-4.4 times those of aeolian soil on an average and its microelements are 1.08-1.3 times that of the latter.
As against the average nutritive element content of the ploughed paddy field, the phosphorite contains phosphorus about 17 times and calcium, magnesium, zinc and boron nearly two-five times.
In order to increase the phosphorite’s compound fertilizer effect, the research team selected a microorganism bacterial strain strong in biological activity with which it treated phosphorite. It thus succeeded in making quality phosphoritic organomineral fertilizer with nutritive elements of high fusibility including phosphorus, calcium, zinc, manganese and boron.
The fertilizer also contains humus substances and nitrogen which are not found in phosphorite.
A number of farms have applied the fertilizer to crops including rice, maize and potato, thus raising their yield remarkably.
The technology can be easily introduced into production without any restriction of raw materials.
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