The aim of this work was to study the effects of water and nitrogen application on corn crop components (BR 201) and productivity in the cerrado area of Roraima, Brazil. The statistical analysis consisted of a 4 X 4 randomized block design, using split plots with 16 treatments and 4 replications. The four water depths used were 392.6; 337.6; 282.6 and 227.6mm and the four nitrogen rates were 0; 50; 100 and 150 kg ha-1. The water depth used influenced the height of the corn plant. Irrigation and nitrogen levels influenced the mass of 100 seeds, the number of ears per hectare and the grain productivity. The seed N levels were linearly influenced by the nitrogen fertilization.
Zea mays; cerrado; Roraima