00799cam a22002531 4500 agr49000109 DLC 20260227111011.0 780726s1949 dcuab b i000 0 eng c agr49000109 (OCoLC)4087441 U.S. Dept. of Agr. Libr. OAk OCoLC DLC premarc S633 .I3 631.816 Ignatieff, Vladimir, ed. Efficient use of fertilizers. Washington, Food and Agriculture Organization of the United Nations, 1949. x, 182 p. illus., maps. 23 cm. FAO agricultural studies, no. 9 "For further reading" at end of most of the chapters. Fertilizers. FAO agricultural studies ; no. 9. 10990 10990