TY  - BOOK
AU  - Magat,Severino S.
TI  - Knowing soil fertility management and fertilizers: quick notes-reviewer 
SN  - 9-7191-0511-9
AV  - S 599.6.P6  M2708 1993
PY  - 1993///
CY  - Quezon City, Metro Manila
PB  -  DOST
KW  - Soil fertility
KW  - Philippines
ER  -