Copyright Deutsche Morgenl'andische Gesellschaft 2006.The prerequisite to the whole development was the mastering of artificial incubation to ensure limitless availability of ... process required a stable source of constant temperature (achieved with the a#39;electric forced draught egg incubatora#39; in ... finally in the 1960s by the genetically controlled breeding of chicken like the White Leghorn which lay up to 300 eggs ... Within the same time the a#39;conversion ratioa#39; of lbs. feed into lbs. broiler optimized from 4.4 into 1.9 (William Boyd: aquot; Making Meat.
|Title||:||Über Himmel und Erde|
|Author||:||Erling von Mende|
|Publisher||:||Otto Harrassowitz Verlag - 2006|