TY  - BOOK
AU  - Flaig,W.
ED  - Food and Agriculture Organization of the United Nations.
TI  - Organic materials and soil productivity
T2  - FAO soils bulletin
SN  - 9251005109
PY  - 1977///
CY  - Rome
PB  - Food and Agriculture Organization of the United Nations
KW  - Humus
KW  - Organic fertilizers
KW  - Soil fertility
KW  - Soil productivity
N1  - Bibliography: p. 101-119; Includes bibliographical references (p. 101-119)
ER  -