Chinese researchers say they have developed three new hemp cultivars which have levels of CBD well beyond other varieties common in China. Developed by the Institute of Hemp at the Chinese Academy of Agricultural Sciences, the new varieties are said to produce crops with strong drought and disease resistance. The strains, “Zhonghan Ma” Nos. 2, 3 and 4, contain CBD levels at 3.22%, 4.22% and 4.29%, respectively while stable at less than 0.2% THC, the Academy reported. Common hemp planting seeds in China have only about 1% CBD.