Soil science Americana. Chronicles and progressions 1860-1960: by Alfred E Hartemink, Cham, Springer Nature Switzerland, 2021, xxxiv+623 pp., $US 49.99, ISBN 978-3-030-71134, e-book 71135-1.

Truog, who had more interest in soil chemistry, summed up his survey experience as: 'For the most part, we got along with such commonly understood descriptive words as dark or light, tight or open, top-soil or subsoil, level or hilly, and sand, silt and clay. Kellogg had little time to get used to his new position: Marbut died in Harbin in August 1935 and Kellogg, only 32 years old, was appointed to succeed him. References 1 Marbut, C.F., 1924, Soils: Their Genesis and Classification (Madison WI: Soil Science Society of America, 1951). [Extracted from the article]