TY  - GEN
AU  - United states, Department of agriculture
TI  - Soil: the yearbook of agriculture 1957
AV  - 010 
U1  - 631.43 UNI 
CY  - Washington, United states goverment of agriculture
KW  - Fertility
KW  - Moisture
KW  - Regions
KW  - Soil care
ER  -