 Complete the following phrase:  In 1929, after finishing high school in Puławy, he started his studies at the Faculty of Agriculture and Forestry in Lviv Polytechnic at the time, Lviv was part of Poland, nowadays it is in Ukraine. In 1933, after graduating, he worked as an agricultural instructor in the Lviv Agricultural Office. At the same time, he held a position as an assistant in the Department of Soil Science and Agricultural Chemistry, Lviv Polytechnic, then headed by Arkadiusz Musierowicz, with headquarters in Dubliany near Lviv. In 1939, he obtained a PhD in Agricultural Science. That same year, after the invasion of the Red Army into Eastern Poland, he decided to remain at the university as a docent. In 1941, after the 