Abstract
The dynamics of nitrogen (N) in the soil is directly or indirectly affected by cultivated plants and production systems. Conservation systems such as no-tillage can, over time, improve the efficiency of N use, where pH, C / N ratio and microbial activity are the main regulating factors. Forages of the genus Urochloa (Sin Brachiaria) and Megathyrsus (Sin. Panicum) can alter the availabilit…