Resumen
- A new technology was used to estimate root-length density and root exploration from root counts (grid method) on soil profiles. This method includes a computer model, developed by Chopart and Siband (1999). This model called "RACINl" was previously validated under African conditions, and then validated in the Colombian eastern plains. The results indicate that the drastic reduction in the development of maize roots at the anthesis phase is related to the presence of physical and chemical restrictions, which were enhanced as depth increased