woman: we are at the indian valley organic farm and garden in novato, california. it is on the campus of the college of marin. this farm is special and unique because it's currently a collaboration of 3 organizations--the cultural conservancy, the college of marin, and marin master gardeners. the cultural conservancy focuses on revitalizing native heirloom vegetables and medicines and basketry and other material plants. woman: we celebrate the tradition of indigenous agriculture and the true, you know, ingenuity that comes with thousands of generations of development of these particular growing techniques. so, every year, we grow a three sisters plot in a traditional mounding, planting sequence. the three sisters is ingenious because we have the beans feeding nitrogen to the corn and the corn providing a stand for the beans and the squash covering the ground and mulching and keeping weeds down and moisture in, and in order to harvest all of this, like, you really gotta get down and dirty. there's no machine that can be developed in order to harvest this. we don't w