Pyongyang, December 19 (KCNA) -- The Academy of Agricultural Science in the DPRK intensifies researches to increase the grain production.

Wheat, barley and strains institutes under the academy are putting spurs to the cultivation of a strain of winter wheat with much gluten, whose per-hectare yield is high, and other high-yielding tasty and quality strains growing well despite the unfavourable environment.

The Institute of Agro-chemicalization improved the function of seed-covering material "Phungnyonmo 1" and is now making preparations for its mass production.

The Dry-field Crop Research Institute and other research institutes developed a technology of raising sweet potatoes with much sugar and high per-hectare yield, even in winter with stems and sprouts. They are now striving to produce millions of the seedlings for all city and county raw material bases of the country. -0-