California rice growers have a new tool to help them deal with drought and environmental change, thanks to University of California researchers. A new crop rotation calculator provides farmers in the Sacramento Valley with information on the financial costs of transitioning fields from rice to four alternative crops: dry beans, safflower, sunflower or tomato. Having the flexibility to rotate to less water-intensive crops is one way for farmers to manage during times when there’s not enough water to grow rice. Rotation can also aid with weed, disease, and insect control. The calculator is a collaborative effort of UC Agriculture and Natural Resources, UC Integrated Pest Management, and UC Davis.