(i) They had to judge how long the herds could stay in one area. Know where they could find water and pasture.
(ii) They needed to calculate the timing of their movements, and ensure that they could move through different territories.
(iii) They had to set up a relationship with farmers on the way, so that the herds could graze in harvested fields and manure the soil.
(iv) They combined a range of different activities – cultivation, trade, and herding – to make their living.
