When the summer sun sets over northwest Illinois, the crew members of Silver Streak Ag Services LLC cut their engines and climb down from their tractor cabs. Their job might not be done — in fact, it may have just been getting started — but they submit to their growling stomachs and pause for a paper plate meal in the middle of the field. This is a nightly tradition for John and Monica Osterhaus, owners of the custom forage harvesting business near Chadwick, Ill...