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.
As a rule of thumb, a cow will eat 2 to 2.5 pounds of hay per day for each 100 pounds of body weight (about one 30- to 40-lb. bale per day). If you feed grain, the usual is 16% dairy ration, which will balance well with most pasture or hay. Another rule of thumb is to give 1 lb. of grain for every 3 lbs. of milk.verage milk production is about 2 gallons each day when the calf nurses during the days but not at nights, or 4 to 5 gallons each day when a calf is not nursing. The butterfat content is 4 to 5% even when the cow gets little or no grain.