TY  - GEN
AU  - shirlaw, Gilchrist D W
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 & co. Ltd.
KW  - Soil fertility/soil chemistry/soil acidity
ER  -