TY  - BOOK
AU  - Tisdale,Samuel L.
AU  - Nelson,Werner L.
TI  - Soil fertility and fertilizers
SN  - 0024208604
AV  - S633 .T66 1975
U1  - 631.4/2 
PY  - 1975///]
CY  - New York
PB  - Macmillan
KW  - Soil fertility
KW  - Fertilizers
KW  - Crops
KW  - Nutrition
ER  -