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.
How many acres are in a section of land? In the United States and Canada, a section in land measure is 1  square mile, equal to 640 acres, or about 259  hectares or 2.59 square kilometers in Metric measures.   â¦  See related link.ith 268,820 square miles of area and 640 acres per square mile the actual acerage is 172,044,800 acres.