AGRICULTURE Diné Philosophy Why do Navajos create sandpaintings? What is the significance of the four sacred plants in sandpaintings? View the Slideshow. What's in a seed? During their life cycle, plants grow from seed and make the seeds for the next year’s crop. These seeds are an important living investment in our future on this planet. Watch beans grow in the Bean Lifecycle. Test your knowledge of life cycles with a Round of Squash. Learn what’s in a Seed Bank from biologist Mary O’Connell. Watch a video on the importance of Plant Varieties, with biologist Mary O’Connell. Corn: An Ancient Food What do you know about the history, uses, and importance of corn? Read the Corn Report. Play We're All Ears. Take the Corn Quiz. A Bean for all Places Beans have a long history in Native American agriculture. Many varieties of beans have been cultivated to adapt to the unique arid growing conditions of the desert Southwest. Read more about Beans in the Americas. Hunt for Beans on the World Wide Web. Acorn, Butternut, Calabash… Squash types vary from acorn squash to butternut to zucchini and include pumpkins and other types of gourds. View the Squash Slideshow. Sacred Uses of Tobacco Tobacco from the Four Sacred Mountains is sacred in Navajo teachings. Listen to storyteller Hoskie Benally talk about Five Medicinal Plants. Watch Robert Johnson discuss the sacred uses of tobacco. The Three Sisters and Companion Planting Did you know that how you arrange plants in your garden affects how they grow? With careful planning, plants such as the Three Sisters can work together in a garden. View the Companion Planting slideshow. Play the Companion Planting Game.