The Effect of Soil Compaction on Ammonium and Nitrate Concentrations and Wheat Nitrogen Uptake in two Different Soils

In order to investigate the effect of soil compaction on soil nitrogen mineralization process and its uptake by wheat a factorial experiment in a completely randomized design with three replications was designed. Experiment was conducted with three levels of compaction (normal, 10% and 20% compression), two soil textures (sandy and clay) and five sampling times (1, 7, 14, 30 and 60 days after planting). Ammonium and nitrate concentrations in soil were measured at five time intervals. Results indicated that the effect of soil compaction, time interval and the interaction of soil compaction and time intervals on concentrations of ammonium and nitrate were significant (p