Those who live in the Barotse valley cultivate in addition the sugar-cane, sweet potato, and manioc ('Jatropha manihot').

The climate there, however, is warmer than at Linyanti, and the Makalaka increase the fertility of their gardens by rude attempts at artificial irrigation.
The instrument of culture over all this region is a hoe, the iron of which the Batoka and Banyeti obtain from the ore by smelting.

The amount of iron which they produce annually may be understood when it is known that most of the hoes in use at Linyanti are the tribute imposed on the smiths of those subject tribes.
Sekeletu receives tribute from a great number of tribes in corn or dura, ground-nuts, hoes, spears, honey, canoes, paddles, wooden vessels, tobacco, mutokuane ('Cannabis sativa'), various wild fruits (dried), prepared skins, and ivory.

When these articles are brought into the kotla, Sekeletu has the honor of dividing them among the loungers who usually congregate there.

A small portion only is reserved for himself.
The ivory belongs nominally to him too, but this is simply a way of making a fair distribution of the profits.