More information from O*NET OnLine:

Graders and Sorters, Agricultural Products - 45-2041.00

O*NET-SOC Description

Grade, sort, or classify unprocessed food and other agricultural products by size, weight, color, or condition.

45-0000	Farming, Fishing, and Forestry Occupations
45-2000	Agricultural Workers
45-2040	Graders and Sorters, Agricultural Products
45-2041.00	Graders and Sorters, Agricultural Products

43-5111.00	Weighers, Measurers, Checkers, and Samplers, Recordkeeping
45-2092.00	Farmworkers and Laborers, Crop, Nursery, and Greenhouse
51-3022.00	Meat, Poultry, and Fish Cutters and Trimmers
51-3091.00	Food and Tobacco Roasting, Baking, and Drying Machine Operators and Tenders
51-3092.00	Food Batchmakers Bright Outlook
51-3093.00	Food Cooking Machine Operators and Tenders
51-9012.00	Separating, Filtering, Clarifying, Precipitating, and Still Machine Setters, Operators, and Tenders
51-9111.00	Packaging and Filling Machine Operators and Tenders
53-7063.00	Machine Feeders and Offbearers
53-7064.00	Packers and Packagers, Hand

Discard inferior or defective products or foreign matter, and place acceptable products in containers for further processing.
Grade and sort products according to factors such as color, species, length, width, appearance, feel, smell, and quality to ensure correct processing and usage.
Place products in containers according to grade and mark grades on containers.
Record grade or identification numbers on tags or on shipping, receiving, or sales sheets.
Weigh products or estimate their weight, visually or by feel.