The Tepehuanes use four.

Their hoes are generally bought from the Mexicans or else home-made, the natural knotted growths of tree limbs being utilised.

Women never assist in ploughing, though they may be seen helping in the fields with the weeding and hoeing, and even with the harvesting.
In the sierra a piece of land may yield good crops for three years in succession without manure, but in the broad mountain valleys and on the mesas a family can use the same field year after year for twenty or thirty seasons.

On the other hand, down in the barrancas, a field cannot be used more than two years in succession, because the corn-plants in that time are already suffocated with weeds.

The planting is done from the middle of April to the first week in July, and the harvest begins about the first week in October and lasts until the beginning of December.
Communal principles prevail in clearing the fields, in ploughing--each furrow in a field is ploughed by a different man--in corn planting, in hoeing, weeding, harvesting, gathering wood for feasts, in fishing and in hunting.
If a man wants to have his field attended to, the first thing he has to do is to prepare a good quantity of the national stimulant, a kind of beer called tesvino.