Dry-matter production and nitrogen uptake in winter maize (Zea mays)-basedintercropping system under different levels of nitrogen

A field experiment was carried out during winter seasons of 1992-93 and 199 3-94 to study dry-matter production and nitrogen uptake in component crops in sole maize (Zea mays L.), maize + pea (Pisum sativum L.) and maize + len til (Lens culinaris Medikus) cropping systems under 0, 50, 100, 150 and 200 kg N/ha applied to maize on row basis. Maize grown in association of legum es accumulated significantly more dry matter and nitrogen than in sole stan d. The highest dry-matter production and N uptake were recorded in maize pea cropping system. Legumes produced less dry matter when intercropped com pared with their sole stand. Dry-matter production and N content of compone nt crops exhibited an increasing trend with increasing N levels. Total N up take increased significantly up to 150 kg N/ha in sole maize and up to 100 kg N/ha in intercropping systems.