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Selected postharvest operation from harvesting to conveying and cleaning/sorting/grading and warehousing of dry beans are shown in ssss1, which include:

1 Direct harvest combine for cutting upright beans. The cutter heads may be 40 feet across, and the full hopper of beans is directly transferred to a field truck for transport to elevator.

2 Dumping/unloading of truck at receiving station of elevator. The total weight and sample taken for quality grading that is used for payment to the grower.

3 Conveying beans: Beans are conveyed on rubber conveying belts (to minimize damage) for in‐plant bean cleaning.

4 Beans conveyed over air aspiration and “gravity table” for cleaning. Cleaning employs air aspiration (for removal of pods and light debris), size screening (removal of over and under sized beans and debris), and “gravity table” (removal of stones and mud balls).

5 Electric eye sorting machine. Beans are distributed in channels and individually passed over optical sensors. Out of specification beans are rejected with a blast of air (for removal of off‐colored beans).