RISALAH Hasil Penelitian Pengelolaan Produktivitas Lahan Pasca letusan Gunung Kelud. text Malang Balittan Malang 1991 ind vi, 95 p, iLL. ; 25 cm. SOIL FERTILIZY SOIL MANAGEMENT FERTILIZER APPLICATION 631.8 636/INS/p ISSN: 0853-1420 200129 20200129155824.0 INLIS000000000000028 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)