na INLIS000000000002290 0010-0121000656 Preminilary investigation in the development of soil cracks in the irrigated areas of the ricefield Abdul Rozak Yogyakarta Gajah Mada University 1989 12 p. : ill ; 29 cm 631.4 631.4 SOIL CRACKING ORYZA SATIVA PADI IRRIGATED LAND IRIGASI. 3354 3354 3454