Loam Soil

Hemp grows best on a loose, well-aerated loam soil with high fertility and abundant organic matter, with a pH of 6.0-7.5. Well-drained or tiled clay soils can be used, but poorly-drained clay or poorly structured soils often results in establishment failures, as seedling and young plants are prone to damping-off. Loam is a classification given to soil that contains relatively balanced amounts of sand, silt and clay. Loam soils typically contain less than 52 percent sand, 28 to 50 percent silt, and between 7 and 20 percent clay. Classification as a loam soil has nothing to do with the organic material it contains or where it is found. A mixture that contains almost equal amounts of silt, sand and clay is referred to simply as loam.

Challenges of Revitalizing Hemp

For states which define hemp (< 0.3% THC) as distinct from marijuana, the USA Agriculture Act of 2014 which is found under US Law at 7 USC §5940 et seq allows departments of agriculture or universities to cultivate hemp as part of a research pilot program. As of 2017, at least 39 US universities and dozens of researchers have begun studying hemp, yet guidance on top research priorities are lacking.