Pyongyang, January 20 (KCNA) -- Researchers of the Hamhung Branch of the State Academy of Sciences in the DPRK have made successes in developing slow effective fertilizer.

In the course of intensifying the research with the main emphasis on increasing the efficiency of fertilizer, they established a new method of producing Korean-style slow effective fertilizer.

On its basis, they established a slow effective fertilizer production process and introduced it into a field to prove its effectiveness. -0-