RESEARCHES ON THE VEGETATION PERIOD OF SOME MAIZE HYBRIDS ASESSED BY THE NUMBER OF LEAVE

For to define more accurately the precocity group of some maize hybrids depending on vegetation conditions from maize growing area, different researches analyzed the number of leaves as invariable factor dependent on hybrid. In this writing we offer dates about number of leaves for ten maize hybrids cultivated in experimental field from Varieties Testing Centre, Targoviste. Differences between hybrids were clearly and for this reason we can classify these hybrids in two precocity groups (medium early or late).