TY  - GEN
AU  - Shirlaw, D.W.Gilchrist
TI  - Soil fertility and field methods of analysis : a guide for agricultural students and advisers, gardeners and horticulturalists
U1  - 631.422 SHI 
CY  - London, Cassell & company
KW  - Soil fertility/ soil chemistry/ soil acidity
ER  -