[2] Regions with an ustic soil moisture regime often experience erratic rainfall which mostly occurs during the growing season.

[4] The ustic soil moisture regime is also common in Central Africa (Zambia, Tanzania, Angola), in India, and in some countries of Eastern Europe and South America.

To have an aquic moisture regime, a soil must be saturated for at least a few days a year, because it’s implicit in the concept that dissolved oxygen is virtually absent.

The soil moisture control section is dry in summer and moist in winter in all parts for 45 or more consecutive days in 4 months.

[1] A principle characteristic of ustic soil is that it is preferable for the cultivation of crops that are tolerant, albeit resistant, to periods of drought.

Consequently, these regions require rapid sowing, harvesting, transport and storage, all of which increase the costs of the operation.

[10] Regions possessing an ustic soil moisture regime have a significantly large window for the harvesting of crops at the onset of the dry season.

For example, Brazilian farmers in the Cerrado region leverage on the warm dry season to harvest their grain at a more leisurely pace.