Field trials were conducted during the 2006, 2007 and 2008 rainy seasons at the Institute for Agricultural Research Samaru, in the Northern guinea savanna zone of Nigeria to evaluate the effects of weed control and cow dung manure treatments on growth of Quality Protein Maize. The trial consisted of factorial combinations of eight weed control treatments which include application of (Atrazine + Acetochlor + Terbuthylazine at a ratio of 1:1:1, Atrazine + Metolachlor at a ratio of 1:2 each at 3.0 and 4.0kg a.i/ha, Atrazine at 4.0 and 5.0kg a.i/ha, Hoe weeding at 3 and 6 weeks after sowing and a weedy check) with four cow dung manure levels at (0, 4, 8 and 12t/ha and a recommended NPK mineral fertilizer check at the rate of 120kg N, 26kg P and 50kg K/ha). The treatments were laid out in a split plot design with three replicates. In the mean data, application of Atrazine + Metolachlor at 4.0kg a.i/ha and the two hoe weedings produced significantly (P < 0.05) higher and similar values for total dry matter and crop growth rate, whereas Atrazine + Metolachlor at 4.0kg a.i/ha only produced significantly (P
Key words: Weed control, Cow dung manure, Growth indices, Quality protein maize
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