Preview and Important events in Greece & World. National & International legislation. Quality & Management of organic products.  Environment & Organic agriculture. Soil fertility & organic agriculture. Basic principles of organic production.   Soil sustainability & ecosystems. Mulching. Plant material and organic agriculture.  Weed control & management in organic agriculture. Crop sanitation and pest management.  Organic and inorganic fertilization in organic crops. The role of legumes in rotation. Organic crops & profitability. Water demands in organic crops. Harvest, storage and packing of organic products.