Vlijanie differencirovannykh doz azotnogo ydobrenija na soderzhanie nekotorykh mikroehlementov v sene iz lugov raspolozhennykh na razlichnykh torfjano-murshevykh pochvakh
EN
Effect of differentiated nitrogen fertilzer rates on the content of some microelements i hay from meadows situated on different peat-moorsh soils