Maize ( Zea mays) is one of the important cereal crops cultivated in India. Its area is expanding fast in Andhra Pradesh. Plant density in corn, varies with soil, rainfall, hybrid, planting pattern and field preparation (Olson and Sander, 1988). Of late, Zero tillage maize, after kharif rice is gaining popularity among the farming community in Andhra Pradesh. In zero tillage, after harvesting kharif rice, maize seeds will be dibbled under optimum moisture condition without any field preparation. Pre emergence spraying of atrazine in combination with paraquat or glyphosate is practiced to control weeds. Fertilizer application starts from 15 days after sowing in various quantities. In general, intercultivation is not practiced. The crop receives 4-6 irrigations depending on soil type.
