Multiple harvests are made possible in regions not mild enough to grow wet rice through the cultivation of crops that have shorter growing seasons, can be planted and harvested quickly, or are tolerant to drought or extreme temperatures.
One example is the cultivation of dryland crops such as wheat, barley, and rye, which can be grown in areas with low rainfall or unpredictable weather patterns. These crops can be planted in the fall, grow over the winter, and then be harvested in the spring or early summer. This allows for multiple harvests in the same year.
Another example is the use of irrigation to grow crops in arid regions. In regions where there is not enough rainfall to support crops, farmers can use irrigation to artificially supply water to the fields. This allows them to grow crops that have a longer growing season or require more water, such as cotton, maize, or sorghum. With irrigation, it is possible to grow multiple crops in a single year, as long as there is enough water to support the growth of the plants.
In addition, the use of crop rotation, where different crops are planted in the same field in different years, can also help to maximize the use of land and resources, and can lead to multiple harvests over time.
Overall, multiple harvests are made possible in regions not mild enough to grow wet rice through a combination of selecting crops that are suited to the local environment, managing water resources through irrigation or other techniques, and using crop rotation to optimize the use of land and resources.