Besides tractors, these include ploughs, harrows, drills, transplanters, cultivators, irrigation equipment, and harvesters. Rotary tillers are a type of cultivators. Examples included front-end loaders, belly mowers, row crop cultivators, corn pickers and corn planters. They were metalworkers, cultivators of millet, and cattle herders. Skocpol defines peasants as primary agricultural cultivators. Earlier Irular were hunters, gatherers and shifting cultivators. The Pallars are generally farmers, cultivators and soldiers. This may involve the use of a chisel plow, field cultivators, or other implements. The Shan are traditionally wet-rice cultivators, shopkeepers, and artisans. Such bolts continue to be used to hold shovels onto cultivators. Their main occupations include working as shifting cultivators, hunters and fishermen. The boundaries between states impact the viability of subsistence and trade relations with cultivators. There they were traditionally cultivators, traders and money lenders. By 1750, the primary cultivators of the cash crop were West African slaves. This led to great resentment among cotton cultivators and traders.