The publication of this model in his book De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres) just before his death in 1543 was a major event in the history of science, triggering the Copernican Revolution and making an important contribution to the Scientific Revolution.
World market prices for dairy products The average world market price of butter in 1981-2006 was US$1 580/ton, fluctuating between US$1 000/ton and US$2 000/ton. It shot up to US$2 886/ton in 2007 and, in the first six months of 2008, increased further to US$4 021/ton.
Thus, if corn silage is worth $100 per ton of dry matter, alfalfa hay is worth $135 per ton of dry matter or $120 as-fed. As the milk:feed price ratio goes up, the value of alfalfa hay compared to corn silage becomes greater.At a milk:feed ratio of 2.5, alfalfa hay is worth $50 per ton of dry matter more. Consequently, if corn silage is worth $100, then alfalfa hay should be worth $150 per ton of dry matter ($135 as-fed).or example, at a milk:feed price ratio of 1.45 (June 2009 which was a record low), alfalfa hay is worth no more than $35 per ton of dry matter over the price per ton of corn silage (on a dry matter basis).