Undersown crops in cereal crop rotation - Känkänen, Hannu (The Agricultural Research Centre of Finland, Unit for International Cooperation, 1997)
Keywords: Ka; aluskasvi; viljelykierto; typpi; mineral nitrogen; nitrate nitrogen; ammonium nitrogen; N leaching; undersowing; undersown crop; intercropping; cover crop; westerwold ryegrass; white clover; spring barley; spring wheat; oats; red clover; meadow fescue