Then, magma upwelling at the Mid-Atlantic Ridge began to produce oceanic crust, parting the continents to form the Atlantic Ocean. Today the Mid-Atlantic Ridge snakes down the center of the Atlantic all the way from Iceland to the Antarctic Plate and remains an active site of sea-floor spreading..
Most calves are weaned between 120 and 290 days (3 to 10 months) after birth, but most producers like to wean their calves when they're around 205 (6 months) of age.Weight is also a factor, with the minimum being generally around 132lb (60kg). This will only add to the stress of the calves during weaning time. 2  Beware of the likely reaction of the first-calf heifers. 3  They will crawl the fence if you do not make it escape proof with a couple of strands of hot electric wire or steel panels.
Weaning calves earlier cuts feed costs. A 1994 Penn State study that compared the cost of raising calves to 112 days of age estimated that weaning at 30 days instead of 60 days saved $32 per calf. Weaning at 45 days instead of 60 days saved $19. Weaning at 30 days saved $13 compared to weaning at 45 days. If we use 2007 milk replacer costs in this analysis, we see that weaning at 4 weeks may save as much as $55 per calf over 8-week weaning. Weaning at 45 days will save up to $30 per calf over 60 days.