Upon arrival in Sweden , Yaalon immediately requested admission to the Swedish University of Agricultural Sciences at Uppsala . There he met the prominent Swedish soil chemist Sante Emil Mattson ( 1886-1980 ) , who appointed Yaalon as his assistant . At that time , Yaalon made his first soil-profile observation . In 1944 Yaalon returned to Czechoslovakia and volunteered in the Czech Army , unaware that his family had been killed in The Holocaust . After the war , Yaalon discovered that his mother had been sent to Theresienstadt concentration camp in Czechoslovakia , and then to Auschwitz-Birkenau in Poland , where she was killed . Yaalon left Czechoslovakia and returned to Denmark to resume his studies , completing a B.Sc . in Agricultural Sciences ( Soil Chemistry ) in July 1947
The Holocaust
The Holocaust
Dan H. Yaalon