Effects of Parent Material on Genesis of Borolls and Boralfs in South-Central New Mexico Mountains
1975
Anderson, J. U. | Bailey, O. F. | Rai, D. (Dhanpat)
A field study of a 186 km² area, a more detailed study of a 65 ha area, and laboratory analysis of four soil profiles has shown that, in this high elevation forested area in New Mexico, Borolls are forming in residuum from limestone, but Boralfs are forming where the parent material is from sandstone. These Borolls resemble the classic concept of Rendzina, but lack a udic moisture regime necessary for Rendolls. The Boralfs are distinctly different from the Borolls even though all soil-forming factors other than parent material appear to be the same. The absence of evidence of illuviation of clay in the Borolls can probably be attributed to the presence of calcium carbonate in all soil horizons, but the very great differences in organic matter content can probably not be accounted for by the data presented.
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