Dust Bowl, Irish Potato Famine linked to one crucial farming mistake: growing same crop in same piece of land year after year<br />Dust Bowl – land depleted of nutrients<br />Potato Famine – disease stayed in soil<br />
Rotating crops is ancient practice<br />Farmers in Ancient Rome, Africa and Egypt rotated their crop<br />In England in Middle Ages farmers used three-year crop rotation of rye, oats or barley and nothing the third year <br />
Definition of Crop Rotation<br />Vegetable crops grown in different areas of garden in succession in consecutive years.<br />Change type of plant grown on particular piece of land from year to year or season to season<br />
Prevents buildup of soil-borne pests and diseases specific to one group of crops <br />Prevents depletion of specific nutrients<br />
Eachcrop tends to pull particular set of nutrients from soil depending on its particular needs. <br />
Year after year of same crop allows certain pests and diseases to become comfortable <br />Rotation confuses pests and keeps populations low<br />Diseases don’t become established<br />
used to build organic matter and soil nutrients that certain plants use during their life cycle<br />.<br />
Not only individual plants, but certain families of plants are subject to same diseases and should not be planted in the same area more than once every 3 years<br />Potatoes, tomatoes, peppers, eggplants<br />
Solanacea or nightshade family--tomato, pepper, eggplant, potato, tomatillo;<br />Onion family--onions, garlic, leek, shallot, chives;<br />Cucurbit or gourd family--cucumbers, muskmelon, watermelon, squash, pumpkin, gourd;<br />Mustard or cole family--cabbage, broccoli, cauliflower, Brussels sprouts, kohlrabi, turnip, radish, Chinese cabbage, kale, collards, mustard greens, rutabaga;<br />Legume or pea family--garden pea, snap beans, lima beans, soybean;<br />Grass family (edible part is seed)--sweet corn, popcorn, ornamental corn;<br />Carrot family (edible parts are roots, leaves, and leafstalk)--carrots, parsnip, parsley, celery;<br />Goosefoot family--beet, Swiss chard, spinach;<br />Sunflower family--lettuce, Jerusalem artichoke, endive, salsify;<br />Bindweed family (edible part is root)--sweet potato;<br />
Rotation Plan<br />Crops planted in Bed 1 are planted in Bed 2 the following year, and in Bed 3 the year after that, and then Bed 4 and back to 1 again. <br />
Green Manure<br />traditional component of crop rotation is replenishment of nitrogen through the use of green manure crop<br />
Crop rotation can also improve soil structure and fertility by alternating deep-rooted and shallow-rooted plants.<br />
Irish Potato Famine could have been prevented by crop rotation to divert the spread of potato blight.<br />
Vegetables usually divided into four groups to accommodate four-year rotation plan<br />http://www.yankeegardener.com/resource/croprotate.html<br />http://www.letsgogardening.co.uk/Information/CropRotation.htm<br />
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