Each group contained 25 cattails. All of the groups were grown in the same type of soil, they all received the same amount of light, and they were all kept at the same
Cooking at a constant oven temperature of 300Â°F (160Â°C), a 5- to 8-lb standing rib roast will take 17-19 minutes per pound for rare, 20-22 for medium rare, 23-25 minutes for medium, and 27-30 minutes for well done.ow long and at what temperature should I cook a beef roast in the oven? Roasting is a great cooking method for a large, tender cut of beef  such as a rib or sirloin roast.
1 Mix together rest of ingredients and rub over roast. 2  Let set for one half hour. 3  Preheat oven to 325Â°, place roast in pan and place on upper oven rack. 4  Cook for 25 minutes per lb for medium or approximately 50 to 60 minutes. 5  Use a meat thermometer to check doneness-should read 140Â° for medium.