Neossolos Litolicos (Cap 12): contato litico ou litico fragmentario \<= 50 cm.

v0.9.29 adds an "implicit lithic contact" heuristic for the FEBR / BDsolos snapshot, where the surveyor often documents Neossolos Litolicos by simply stopping the profile description at the rock boundary (max profile depth \<= 50 cm with no horizon explicitly marked R / Cr / Rk and no B horizon described). Per SiBCS Cap 12 (p 219), Neossolos Litolicos are defined by lithic contact within 50 cm of the surface; in FEBR, this is signalled by the depth of the deepest described horizon rather than by an explicit pseudo-R record.

Usage

neossolo_litolico(pedon)

Arguments

pedon

A PedonRecord.

Details

The heuristic fires only when:

1. the deepest bottom_cm value is \<= 50 cm,

2. no horizon designation begins with B (so we don't accidentally flag shallow Argissolos / Latossolos / etc. that have a Bt or Bw within 50 cm), AND

3. the canonical contato_litico / contato_litico_ fragmentario tests have NOT explicitly returned FALSE (i.e. the surveyor did not describe a non-rock material deeper than 50 cm).

Empirically, the heuristic flips ~190 of the 191 FEBR Litolicos from "neossolos regoliticos" (catch-all) to "neossolos litolicos" (correct), at the cost of a few false-positive Regoliticos that happen to be shallow (the FEBR confusion analysis showed only ~30 shallow Regoliticos).