Hempseed - yield reached 229 hg/ha in 1998 in Bulgaria, according to . This is 10.1% more than in the previous year.
Historically, Hempseed - Yield in Bulgaria reached an all time high of 1,753 hg/ha in 1965 and an all time low of 32.0 hg/ha in 1991.
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Helgi Library 
