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.
It depends on the stocking rate for the area. The type of soil and moisture levels determine how much and how healthy the grass is in an area. For instance in the south east y â¦ ou could run one cow on one acre for a year. Typically on irrigated pasture it takes 5 to 7 acres to run one cow.In the bad lands of eastern Montana it takes 25 acres to run one cow for a year. So pastures are bigger the drier the region is. I have one pasture that is 25 sections or 16,000 acres.So the answer is it depends on the forage available and how big the owner decides to make the pasture. Now perhaps you mean this: The average herd size in the US is right around 12 head. This is because so many places only own one or two cows. have one pasture that is 25 sections or 16,000 acres. So the answer is it depends on the forage available and how big the owner decides to make the pasture. Now perhaps you mean this: The average herd size in the US is right around 12 head. This is because so many places only own one or two cows.