You are the owner of this article. Illinois soil among world's most fertile. ILLINOIS: Path of glaciers through state credited for rich farmland. BLOOMINGTON | Along with Chicago's soaring skyline and Lincoln's prairie roots, Illinois is best known for routinely producing one of the nation's top yields of corn and soybeans.
Poultry hens on small farms in Australia can be expected to yield four to five eggs a week, or 200 a year, by one estimate, while Canadian battery hens are estimated by the Canadian branch of the Humane Society International to lay eggs on seven out of eight days, for a total of about 320 a year.
Chickens usually don't simply stop laying eggs when they get to a certain age, but they will lay fewer as they get older. That said, most laying breeds will lay more or less productively in backyard terms for five or seven years. We know of one ancient buff orpington cross who still lays an egg occasionally at 17 years old!!