TY  - BOOK
AU  - Niskanen, Raina.
AU  - Jaakkola, Antti.
TI  - Comparison of analytical methods in testing soil fertility
KW  - Suelos
KW  - Análisis
KW  - Fertilidad
N1  - Sobretiro de : Journal of Agricultural Science in Finland 57 : 183-194, 1985
ER  -