TY  - BOOK
AU  - Ashman, M.R.
AU  - Puri, G.
TI  - Essential soil science: a clear and concise introduction to soil science
SN  - 0632048859
U1  - 631.4 21st ed.
PY  - 2002///
CY  - Germany
PB  - Blackwell Science
KW  -  Agriculture
KW  - Soil fertility
KW  - Soil science
N1  - Index: pp 191-8
ER  -