H. Yaalon was one of the most accomplished pedologists of the 20th and early 21st centuries. In this paper we gather personal testimonials of the impact Yaalon had on scientists working in the areas of interest to Yaalon. This allows us to qualitatively evaluate the impact of an influential scientist on his field through the ways that he influenced the career choices of others. We found that this influence occurred through 1) personal, face-to-face contact, 2) written correspondence between Yaalon and other scientists, both through letters and through email, and 3) Yaalon's written record itself, without any direct, personal interaction between Yaalon and the other scientists. This influence took place over multiple generations of scientists, ranging from individuals who are currently retired to those who are just now in the very early stages of their scientific careers. The Yaalon example makes clear how successful scientists make significant contributions to their fields of interest well beyond those indicated by commonly used measures.