Analisis biaya produksi dan pendapatan usahatani petani padi sawah berpengairan teknis pedesaan dan sawah tadah hujan : suatu kasus di desa Kebon Kelapa Kecamatan Cimalaka, Kabupaten Sumedang text Tasikmalaya Universitas Siliwangi 1988 x, 61 p. ill ; 30 cm ORYZA SATIVA PADI SAWAH SUMEDANG IRIGASI IRRIGATION ORYZA SATIVA-IRRIGATION WEST JAVA S-1 633.18 633.18 INLIS000000000008350 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19) Integrity constraint violation: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'difhomhus26298trkt7rf90sr2' for key 'PRIMARY' The SQL being executed was: INSERT INTO `session` (`data`, `id`, `expire`) VALUES ('__flash|a:0:{}', 'difhomhus26298trkt7rf90sr2', 1753604725)