Studies on the irrigation and tillage effects on soil water behaviour, water use and yield wheat and rice / S. Mahbubur Rahman. [PhD Thesis] Rahman, S. Mahbubur. Soil Science. 631.7 RAS Thesis (PhD)--Department of Soil Science,University of Dhaka,1997. Includes bibliographical references. Dhaka : University of Dhaka , 1987. 1987. 1987 Text xiv, 253p. : eng