TY - BOOK AU - El-Biely,Mohamed Mahmoud Mohamed TI - Effect of ploughing operation on soil physical properties PY - 1995/// KW - Soil physics KW - Agricultural machinery N1 - Thesis (M.S.)--Tanta University,1995; Includes bibliographical references (leaves 170-177); Microfiche; Cairo,Egypt; ASUNET; 3 microfiches:negative ER -