50 years dynamic of soil fertility of arable lands in forest-steppe zone of Bashkortostan republic
Results of agrochemical monitoring of arable forest-steppe soil in Bashkortostan Republic during 50 years are presented. Established that 40-58% of arable lands needs liming. Arable lands of northern and southern forest-steppe zones are characterizing by low humus content, north-eastern zone - average. All soils are described by de-humification process. Content of available phosphorous in North-eastern forest-steppe is low, in Northern - average and in Southern - high. Content of available potassium is high in all soils and stable duting 50 years. Content of heavy metals in all soils rather exceed maximum permitted concentrations.