Botulinum toxins are the most lethal toxins known. For type A toxin, the toxic dose is estimated at 0.001 mcg/kg (Franz 1997); the lethal dose for a 70-kg person by the oral route is estimated at 70 mcg, by the inhalational route 0.80 to 0.90 mcg, and by the intravenous route 0.09 to 0.15 mcg (Sobel 2005).
1 hectare = 2.47105381 acres. .07 hectare= .17 acres per person. about 7500 square feet per person. While this figure produces a result of around 5-6 people per acre, there are plenty of caveats to consider. If the soil is not ideal, increase the land. If the growing season is short, increase the land.
1. We're long past the myth that it takes two acres of land to feed a single person. Two acres is over 87,000 square feet. This model shows how we can now feed 24 people (or more) on a plot of land only just over 8,000 square feet â and that space includes living space and recreational space.n our average city plot there is 890 square feet of space per person. This, at the least, verifies that we could all have a yard and a home on a land mass the size of Texas without any sacrifice to personal space.