the nyimang tribe measures wealth not by money or land, but by cattle and land. someone who has more cattle than other is considered wealthier. cattle and land for the nymang is like a currency. their tribe also has a balanced trading system: they trade cattle for seeds with other tribes. the seeds and the cattle must be balanced out. if the amma tribe is short on cattle then the number of seeds they get while rise; it works in vice versa as well.