My comments below are a little off topic, but as the subject of true agriculture has raised its little head, I have to comment. For a thoroughly enlightening book on cultivation of food and fiber plants by Native Americans, read Keeping It Living, edited by Douglas Deur and Nancy Turner, UBC Press & U Washington Press. In which are discussed: hauling bulbs around to plant in new spots, how tribes kept woody & toxic species out of good bulb growing areas, how they regenerated good berry picking areas, and other aspects of plant management on the Pacific NW coast that sure sound like agriculture. This book led me to realize that there are a number of food crops that would do better in my area (Pacific NW) than transformed grains like barley, rye, corn and wheat. Two bulbs were grown and stored for carbohydrates: camas and wapato, other bulbs/tubers were less intensively harvested, including a variety of onions, fritillaries, lilies. Also thistles (Cirsium edule, edible thistle). I could go on, but that' s enough. My favorite native (North American) fruits include: blackberries, blueberries, and cranberries. Management methods included: selective harvesting and transplanting, digging, tilling, weeding, sowing, pruning and coppicing, and landscape burning. Despite its dominance today in farm landscapes, agriculture is not always all about cereal crops. Kathleen On the Pacific NW coast, where we are in our second day of clear skies, light frosts at night, and highs near 70F. My plants don' t know what to do, there's no strafing rain.