Some cultural practices on the productivity of green corn varieties

Abstract

An experiment was carried out in 1981, at the Experiment Station of the "Instituto Agronômico de Campinas" (IAC), in Pariquera-Açu, SP, Brazil, in order to maximize the obtention of green corn, through the improvement of some cultural practices. The estudied variables were as follows: three varieties (IAC-Phoenyx 1817, Cargill 742 and Agroceres 351 B);three plowing spacing rows (1.2; 1 and 0.8 m; and three fertilization levels (50-40-20; 62.5-50-25 and 75-60-30). A randomized block design with five replications was used in split plot arrangement. Varieties and fertilization levels were settled in a factorial 3 x 3 in the subplots. The single hybrid Cargill 742 showed the highest yield. The best results for the three varieties were found using the spacing of 0.8 m between rows and the fertilization level of 62.5-50-25. There was no significant interaction between variety x spacing, variety x fertilization levels and spacing x fertilization levels. Cargill 742 showed the smallest number of lesions of Helminthosporium turcicum Pass.