MODERN SOIL SCIENCE—KELLOGG 245 
enormous. Most of the soils are naturally infertile in terms of our 
present practices in temperate regions, but it is possible to modify 
the mineral-organic cycle of these soils and get good production of 
cultivated plants on a secure basis. All the agricultural sciences will 
be involved, along with soil science, medicine, engineering, economics, 
and political science. 
This outline of soil science in modern society leaves a million details 
untold. If peace and abundance in the world are achieved, thousands 
of soil scientists will have contributed their whole lives toward it, 
along with other people. The data of soil science show that abundance 
is possible. Whether it should be achieved, and whether it will be 
achieved, are not scientific questions. Butif the people of the world 
decide that they want peace and enough food, and if they address 
themselves to the economic and social problems standing in the way, 
soil science says it is possible. 
LITERATURE CITED 
1. BARRELL, JOSEPH. 
1914. The strength of the earth’s crust. Journ. Geol., vol. 22, pp. 24-48, 
2. Brown, Irvin C., and THorp, JAMES. 
1942. Morphology and composition of some soils of the Miami family and 
the Miami catena. U.S. Dep. Agr. Techn. Bull. 834, 55 pp. 
3. CHANDLER, Rosert F. 
1939. Exchange properties of certain forest soils in the Adirondack section. 
Journ. Agr. Res., vol. 59, pp. 491-505. 
4, CHANDLER, Rosert F. 
1941. The amount and mineral nutrient content of freshly fallen leaf 
litter in the hardwood forests of central New York. Journ. Amer. 
Soc. Agron., vol. 33, pp. 859-871. 
5. CHANDLER, RoBErRT F. 
1943. Amount and mineral nutrient of freshly fallen needle litter of some 
northeastern conifers. Proc. Soil Sci. Soc. Amer., vol. 8, pp. 
409-411. 
6. CLARKE, FRANK WIGGLESWORTH. 
1924. The data of geochemistry. Ed. 5, U.S. Geol. Surv. Bull. 770, p. 841. 
7. Daz, R. B., and Stasuer, H. 
1909. Denudation, in Papers on the Conservation of Water Resources, 
U. S. Geol. Surv. Water-Supply Pap. 234, pp. 78-93. 
8. GauTIER, E. F. 
1935. Sahara, the great desert. Trans. by Dorothy Ford Mayhew. 264 
pp. New York. 
9. HumsBert, R. P., and MarsHau, C. E. 
1943. Mineralogical and chemical studies of soil formation from acid and 
igenous rocks in Missouri. Univ. Missouri Res. Bull., 60 pp. 
10. Jenny, Hans. 
1941. Factors of soil formation. 281 pp. New York. 
11. Marert, R. pr ta H. 
1936. Race, sex, and environment: A study of mineral deficiency in human 
evolution. 343 pp., illus. Hutchinson, London. 
