TY  - BOOK
ED  - Food and Agriculture Organization of the United Nations (FAO)
TI  - Organic material and soil productivity
SN  - 92-5-1005
U1  - 630 
PY  - 1977///
CY  - Roma
PB  - FAO
KW  - Suelos
KW  - Conservación de Suelos
KW  - Agricultura
N1  - 0289; Soil as a substartum for plant production. Biochemistry of soil organic matter in relation to soil productivity. Importance of soil organic matter to soil fertility. Organic materials as fertilizers in crop production. Economic of using organic materials as fertilizers
ER  -