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How does dry farming conserve water in areas with low rainfall?
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Cereal farming
Combine harvesting wheat.
Dry farming is a method of cultivation used in regions with limited precipitation—typically less than 20 inches annually—that relies on the efficient storage of moisture within the soil rather than irrigation.12
To conserve water, dry farming utilizes several key techniques:
- Moisture Retention: Farmers till the land shortly after harvest to prepare the soil. Keeping fields free of weeds is essential, as weeds compete with crops for limited moisture.1
- Runoff Prevention: Practices are designed to hinder runoff and prevent erosion. An ideal soil surface contains clods or dead vegetable matter to trap water, and in some latitudes, stubble is left in the fields to trap snow.1
- Crop Selection: Farmers choose drought-resistant crops, such as sorghum, which can reduce transpiration and pause growth during dry spells. Alternatively, drought-evasive crops are selected to complete their growth cycles during cooler, less severe times of the year.1
These methods ensure that the limited available moisture is maximized for crop production.1