154 APPENDIX 6 CLASSIFICATION OF MACHINERY AND EQUIPMENT Types of machinery and Group Class Sub-class Title equipment included 1 Manually-operated equipment − Seed/fertilizer drill − Transplanter − Thresher − Winnower − Sprayer − Duster − Hand pump or other hand irrigation devices 2 Animal-powered equipment − Wooden plough − Steel plough − Cultivator − Disk harrow − Seed/fertilizer drill − Leveller − Animal cart − Animal-operated irrigation devices 3 Machine-powered equipment 31 Machines for general farm use − Internal combustion engine − External combustion engine − Electric generator − Electric motor − Computer used for farm management − Other electronic equipment used for farm management 32 Tractors, bulldozers and other − Track-laying tractor vehicles − Four-wheel tractor − Single-axle tractor − Bulldozer − Carryall − Truck − Boat − Other vehicle − Trailer 33 Crop machinery and equipment 331 Land preparation and planting − Power tiller machinery and equipment − Plough − Rotary tiller − Rotary harrow − Disk harrow − Grain drill − Broadcast seeder − Seed/fertilizer drill − Cultivator − Planters − Levellers − Diggers − Land plane − Transplanter World Programme for the Census of Agriculture 2010 155 Types of machinery and Group Class Sub-class Title equipment included 332 Crop maintenance machinery and − Manure spreader equipment − Fertiliser broadcaster − Sprayer − Duster − Water pump − Sprayers and other localized irrigation devices − Other irrigation equipment 333 Crop harvesting machinery and − Mower for grass crops equipment − Hayrake − Haybaler − Forage harvester − Forage blower − Combine harvesters − Corn picker − Digger, potato harvester − Sugar beet harvester − Reaper-binder 334 Post-harvest machinery and − Thresher equipment − Grain cleaner − Sorters and graders 34 Livestock machinery and equipment − Milking machine − Milk cooler − Cream separator − Incubator 35 Aquacultural machinery and equipment World Programme for the Census of Agriculture 2010 .