A system for processing usable crop intermixed with debris andhaving a frame with a conveying system thereon. The conveying system hasa first debris separating assembly with a first subframe having a plurality ofcooperating rollers that are configured to cause separation of debris from theusable crop. A second debris separating assembly, different than the firstdebris separating assembly, has a second subframe with a plurality ofcooperating rollers thereon that are configured to cause separation of debrisfrom the usable crop. The frame and first and second debris separatingassemblies are configured as overall like modules so that the first andsecond debris separating assemblies can be separately operativelyconnected, one in place of the other, on the frame.