TY  - BOOK
AU  - Simpson, Ken.
TI  - Fertilizers and manures
SN  - 9780582447479
AV  - S596.S5 1986 
PY  - 1986///
CY  - London
PB  - Longman
KW  - Ferterlizers
KW  - Manures
N1  - Includes bibliographical references and index
ER  -