Asher, Colin. How to unravel and solve soil fertility problems / by Colin Asher , Noel Grundon and Neal Menzies. - Canberra : Australian Centre for International Agricultural Resea rch, 2002. - 139 p. : ill. ; 21 cm. ISBN: 1863293214 Subjects--Topical Terms: Soil fertility. Soils. Dewey Class. No.: 631.422098131 ASH