Treatments consisted of four planting densities (20×50, 30×50,
20×100 and 30×100 cm) and four levels of nitrogen (0, 50, 100, and
150 kg ha-1) (Table 2). The source for nitrogenous fertilizer was
urea (46%) that was split into three equal parts and applied at ten
days after transplanting (DAP) as basal and remaining portions
were used as top dressing at 30 and 50 DAP.