Hemp oil content is about 25%. Compare this with canola (40-50%), sunflower (45-55%), soybean (20-25%).
Yield of hemp seed 1-2 T/ha (closer to 1). Compared with canola of 1.5-3 T/ha, sunflowers of 2-3 T/ha and soybeans 3-4 T/ha.
Hemp will produce about a third to a fifth of the amount of oil from the same area of land.
While hemp does have an advantage over weeds and not that many of our current insect pests eat it, weeds remain a problem when the crop is small and other pests can be a problem.
DPIW - Industrial Hemp