00358nam a22001097a 4500008004100000020001500041082002700056100002500083245007900108260004200187300001900229140301b        xxu||||| |||| 00| 0 eng d  a9712305813  aFil. 631.4 Sa58bc1990  aSangatanan, Pedro D.  aSoil management : technology and livelihood series /cPedro D, Sangatanan,  ailoilo City :bP.D. Sangatanancc1990  avii,  274 p. :