Nitrogen catch crops in vegetable production

absorption de substances nutritives azote barley biological competition brassica napus brassica oleracea italica broccoli brocoli carotte carrots catch cropping cebada crecimiento croissance cultivo intermedio danemark daucus carota denmark dinamarca growth hordeum vulgare lolium multiflorum lupinus mineralisation mineralization nitrogen nutrient uptake orge phacelia racine raphanus sativus roots zanahoria