00552     2200169   4500001002100000035002000021245014100041700001600182700001900198260005700217300002500274084001100299082001100310650002100321650003200342990000800374INLIS000000000005327  a0010-1021000161  aRisalah hasil penelitan pengelolaan produktivitas lahan pasca letusan gunung keludbseminar dilaksanakan di BALLITAN Malang 22 Juli 1991  ayudi Widodo  aAchmad Winarto  aMalangbBalai Penelitian Tanaman Pangan Malangc1991  aiv,45p.cills; 25 cm  a631.42  a631.42  aPENELITIAN TANAH  aLAHAN PASCA LETUSAN GUNUNG.  a616