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This study investigates the impact of sowing dates and nitrogen (N) top-dress rates on the yield and nitrogen use efficiency of corn hybrids in subtropical southern Brazil. Results indicate that delaying sowing from early to late spring reduces kernel numbers and overall yield, with optimal N rates being lower for late sowings. The findings suggest a reduction of at least 20% in N application rates for late spring sowing to minimize nitrogen losses and production costs.

Author

hiroshi

Language

EN