Nitrogen Transformations in Soils

摘要: Summary A virgin calcareous soil was cropped to barley and cow-bean in a two year's rotation lysimeter experiments. The cultivation induced increases its microbial population, particularly non-symbiotic N-fixers. Only under the gained nitrogen, 62 kg. N/feddan first crop 58 second one. nitrogen balance sheet indicated positive negative barley. N-gains did, however, not completely compensate losses occurred most likely through volatilization of ammonia leaching.