عنوان مقاله [English]
Soil compaction as a global problem and a multi-dimensional and complex process involving the interaction of climate, soil Mashyn- Plant- known to have a significant economic and environmental impacts and to sustainable agriculture is an intractable problem.For In order to assess compaction effect on nitrogen mineralization process in soil in form of factorial completely randomized design with three repetitions have been done in the agricultural faculty of Guilan University. The soil compaction has been studied in three levels (natural compaction, 10% and 20% compaction), sort of soil in two levels (heavy and lightweight texture) and five periodical steps (days of 1, 7, 14, 30 and 60 after implant). Ammonium and nitrate concentration in soil have been determined in five periodical steps. Significant decrease of ammonium concentration in more compacted sample is related to second and third steps (with avarge 20.75 and 13.68 ppm in 20 present compaction, respectively). The results indicate that by increasing soil compaction, the amount of soil nitrogen will decrease. In the compaction sample, less organic nitrogen change into ammonium and formation nitrate decrease because of conversion to ammonium.