The experimental unit area was 3 m × 3.5 m (10.5 m2),
100 kg N ha−1 was applied as urea form (46% N) after 30 days
of sowing. Grains of corn (local variety) were planted (on June 1,
2009 and June 5, 2010) manually in drills 50 cm apart and 30 cm
within hills. Plants were thinned to secure one plant per hill 3
weeks after planting. All other agricultural practices were carried
out as recommended for corn production in both seasons.