sustainability Article Effectiveness of Polyacrylamide in Reducing Runoff and Soil Loss under Consecutive Rainfall Storms Birhanu Kebede 1,2,*, Atsushi Tsunekawa 3 , Nigussie Haregeweyn 4 , Amrakh I. Mamedov 3, Mitsuru Tsubo 3, Ayele Almaw Fenta 3 , Derege Tsegaye Meshesha 5, Tsugiyuki Masunaga 6, Enyew Adgo 5 , Getu Abebe 1 and Mulatu Liyew Berihun 1,2 1 The United Graduate School of Agricultural Sciences, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan;
[email protected] (G.A.);
[email protected] (M.L.B.) 2 Faculty of Civil and Water Resource Engineering, Bahir Dar Institute of Technology, Bahir Dar University, P.O. Box 26, Bahir Dar, Ethiopia 3 Arid Land Research Center, Tottori University, 1390 Hamasaka, Tottori 680-0001, Japan;
[email protected] (A.T.);
[email protected] (A.I.M.);
[email protected] (M.T.);
[email protected] (A.A.F.) 4 International Platform for Dry Land Research and Education, Tottori University, 1390 Hamasaka, Tottori 680-0001, Japan;
[email protected] 5 College of Agriculture and Environmental Sciences, Bahir Dar University, P.O. Box 1289, Bahir Dar, Ethiopia;
[email protected] (D.T.M.);
[email protected] (E.A.) 6 Faculty of Life and Environmental Science, Shimane University, Shimane Matsue 690-0823, Japan;
[email protected] * Correspondence:
[email protected] Received: 3 January 2020; Accepted: 18 February 2020; Published: 20 February 2020 Abstract: The use of anionic polyacrylamide (PAM) as a soil conditioner could help prevent soil loss by water. In this study, we determined the effective granular PAM rate that best reduces runoff and soil loss from Oxisols.