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Tel.: +40 21 318 02 53 Fax: +40 21 310 04 66 www.agro-bucuresti.ro Crop Rotation – a basic principle of Organic (Ecological) Agriculture Prof.dr.Gheorghe Valentin ROMAN UNiv.Assist.dr.Maria TOADER (Organic.Edunet ApplIcation)) Tel.: +40 21 318 02 53 Fax: +40 21 310 04 66 www.agro-bucuresti.ro 2 Years Rotations (with two fields) 1. Winter Cereals 2. Weeding Crops _________________________________________________________________________________________ 1. Winter Wheat 2. Grain Corn _______________________________ 1. Winter Wheat + Winter Barley 2. Grain Corn + Sunflower (or Sugar Beet, or Potato) (Organic.Edunet ApplIcation)) 3 Years Rotations (with three fields) 1. Grain Leguminous 2. Winter Cereals 3. Weeding Crops _________________________________________________ 1. Soybean + Field Beans 2. Winter Wheat 3. Grain Corn ___________________________________________________ 1. Soybean + Peas 2. Winter Wheat 3. Grain Corn ___________________________________________________ (Organic.Edunet ApplIcation)) 1. Peas + Field Beans 2. Winter Wheat + Winter Barley 3. Grain Corn 4 Years Rotations (with four fields) A) 1. Grain Leguminous 2. Winter Cereals 3. Weeding Crops 4. Weeding Crops __________________________________________________ 1. Peas + Field Beans 2. Winter Wheat 3. Grain Corn 4. Grain Corn (or Grain Corn + Sunflower, or Grain Corn + Sugar Beet) ___________________________________________________ B) 1. Grain Leguminous + Industrial Crops 2. Straw Cereals 3. Weeding Crops 4. Weeding Crops ___________________________________________________ 1. Peas + Field Beans + Sunflower (Organic.Edunet ApplIcation)) 2. Winter Wheat 3. Grain Corn 4. Grain Corn + Sugar Beet 5 Years Rotations (with five fields) A) 1. Grain Leguminous 2. Straw Cereals 3. Weeding Crops 4. Straw Cereals 5. Weeding Crops __________________________________________________ B) 1. Grain leguminous + Industrial Crops 2. Straw Cereals 3. Straw Cereals 4. Weeding Crops 5. Weeding Crops ___________________________________________________ C) 1. Grain Leguminous + Industrial Crops 2. Straw Cereals 3. Weeding Crops 4. Weeding Crops (Organic.Edunet ApplIcation)) 5. Straw Cereals Rotations with Alfalfa (+ perennial grass) 1 – 3. Alfalfa (+perennial grass) 4. Weeding Crops 5. Winter Cereals 6. Weeding Crops __________________________________________________ A) B) 1 – 3. Alfalfa 4. Weeding Crops 5. Weeding Crops 6. Winter Cereals (Organic.Edunet ApplIcation)) Rotations with Clover (+ perennial grass) 1 –2. Clover 4. Weeding Crops 5. Winter Cereals 6. Weeding Crops __________________________________________________ A) B) 1 – 3. Alfalfa 4. Weeding Crops 5. Weeding Crops 6. Winter Cereals (Organic.Edunet ApplIcation)) UNIVERSITY OF AGRONOMIC SCIENCES AND VETERINARY MEDICINE BUCHAREST- ROMANIA 1852-2008 (Organic.Edunet ApplIcation))