Sevenhuysen, R.J.Saragih, S.Kselik, R.A.L.2016-07-042016-07-041989International Symposium on Rice Production on Acid Soils of the Tropicshttps://dl-ifs.nsf.gov.lk/handle/1/1652Water management in rice fields on acid sulphate soils of IndonesiaArticle