na INLIS000000000001932 0010-0121000298 633.18 633.18 Bungaran Saragih Rice based farming systems as a reflection of diversified farming in paddy lands in Indonesia : economic significantce, future prospect and problems Bogor Bogor Agricultural University 1994 33 p. ill ; 21 cm INDONESIA. PADI PADI-SISTEM PERTANAMAN 2963 2963 2963