How far out the water is pulled depends on the size of the olla and the quality of the soil. Dense soil (clay) does not water out as far as good soil. Large ollas, with a capacity of (say) 11 liters, will water longer than a smaller 1 liter olla, for example.
The depth to which water is drawn from an olla depends on the size of the container and the quality of the earth. Dense soil (clay) does not allow water to spread as far as fertile soil. Larger containers, holding 11 liters, will supply water longer than smaller ones, such as a 1-liter olla.