38. “Soil classification as the basis for sound agriculture.” Agriculture in the Americas 3: 223- 27, 1943

Series II includes originals and photocopies of Kellogg's published works as well as some related correspondence. This series is arranged in original, rough chronological order according to Kellogg's numbering system, which is described in the key to publications at the beginning of the series. Publications not listed in the key were added to the end of the series and are arranged in chronological order.