00516nam a2200181   450000500170000000800040001702000150002104000090003605000190004510000200006424500970008425000120018126000400019330000300023350000190026365000320028270000200031420150316103825.0000  a0961649607  aUOEL  aS591bG47 1986  aGershuny, Grace  aThe soul of soil :ba guide to ecological soil managementcGrace Gershuny and Joseph Smillie  a2nd ed.  aSt JohnsburybGaia Services,cc1986  aviii, 109p. :bill.c23cm  aIncludes index  2soilxAgriculture (General)  aSmillie, Joseph