Fields of hemp for fibre, seed and oil took up 966,000 hectares in 1928, and in some years of the 1930s about a million. In 1956 the Soviet Union still had the largest area of hemp in the world, 620,000 hectares.[1]
Listed for context. No score change is recorded for Russia here.
References
Checked. The date and the event were compared with a source that was read.