During the trial cycle 2003-2005, we studied the effect of inoculation or of fertilization with nitrogen (N 0 , N 30 , and N 60 ) on the number of nodosities developed by soy on two types of soil: cambic chernozem and brown luvic. On both soil types in the variants inoculated, the number of nodosities was significantly larger than in the control variants. The nitrogen dose N 30 applied before sowing resulted in an increase of the number of nodosities on the brown luvic soil; on the cambic chernozem there were no significant differences compared to the control (N0). The N60 dose resulted in the development of a significantly smaller number of nodosities on both soil types.

soy; nitrogen dose; number of nodosities; and soil type

Presentation: oral