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