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Douglas Harper's Etymology Dictionary
solum

Latin, "ground, soil," of unknown origin.

Wiktionary
solum

n. 1 Within a soil profile, a set of related soil horizons that share the same cycle of pedogenic processes. 2 The upper layers of a soil profile that are affected by climate.

Wikipedia
Solum

The solum (plural, sola) in soil science consists of the surface and subsoil layers that have undergone the same soil forming conditions. The base of the solum is the relatively unweathered parent material. Solum and soils are not synonymous. Some soils include layers that are not affected by soil formation. These layers are not part of the solum. The number of genetic horizons ranges from one to many. A surface layer that is 10 cm thick overlying bedrock can be by itself the solum. A soil that consists only of recently deposited alluvium or recently exposed soft sediment does not have a solum.

In terms of soil horizon designations, a solum consists of A, E, and B horizons and their transitional horizons and some O horizons. Included are horizons with an accumulation of carbonates or more soluble salts if they are either within, or contiguous, to other genetic horizons and are at least partly produced in the same period of soil formation. The solum of a soil presently at the surface, for example, includes all horizons now forming. The solum of a soil is not necessarily confined to the zone of major biological activity. A solum does not have a maximum or a minimum thickness.

The lower limit should relate to the depth of rooting to be expected for perennial plants assuming that soil moisture conditions and soil chemistry are not limiting. In some soils the lower limit of the solum can be set only arbitrarily and needs to be defined in relation to the particular soil. For example, horizons of carbonate accumulation are easily visualized as part of the solum in many soils in arid and semiarid environments. To conceive of hardened carbonate accumulations extending for 5 meters or more below the B horizon as part of the solum is more difficult. Gleyed soil material begins in some soils a few centimeters below the surface and continues practically unchanged to a depth of many meters. Gleying immediately below the A horizon is likely to be related to the processes of soil formation in the modern soil. At great depth, gleying is likely to be relict or related to processes that are more geological than pedological. Much the same kind of problem exists in some deeply weathered soils in which the deepest material penetrated by roots is very similar to the weathered material at much greater depth.

In Scottish law, the solumn is the area of ground that lies inside the walls or foundations of a building.

Solum (disambiguation)

Solum is a term in soils science.

Solum may also refer to:

  • Solum, Norway, a former municipality in Telemark county
  • Solum Lake, a lake in Minnesota
  • Burdette Solum, a South Dakota politician
  • Gunnar Solum, a Norwegian politician
  • John Solum, a musician
  • Roger Solum, a South Dakota politician

Usage examples of "solum".

Caro herba -- carni vae -- Solum purgat, Christi sanguis, Miserere Domine!

Qua contentione Germani, quos propterea Caesar traduxerat Rhenum ut equitibus interpositi proeliarentur, cum constantius universi paludem transissent paucisque resistentibus interfectis pertinacius reliquam multitudinem essent insecuti, perterriti non solum ei qui aut comminus opprimebantur aut eminus vulnerabantur, sed etiam qui longius subsidiari consuerant, turpiter refugerunt, nec prius finem fugae fecerunt saepe amissis superioribus locis quam se aut in castra suorum reciperent, aut nonnulli pudore coacti longius profugerent.

English troops, so much was she biassed by that laudable partiality, which, as Horace observes, the natale solum generally inspires.

Venit enim mihi Plato in mentem, quem accepimus primum hic disputare solitum: cuius etiam illi hortuli propinqui non memoriam solum mihi afferunt, sed ipsum videntur in conspectu meo hic ponere.

Gothicae hujus probitatis exemplum: Gensemundus ille toto orbe cantabilis, solum armis filius factus, tanta se Amalis devotione conjunxit ut haeredibus eorum curiosum exhibuerit famulatum, quamvis ipse peteretur ad regnum.

Itaque hujusmodi musica maximo impedimento non solum pauperi et negotioso viro est, sed etiam omnibus generaliter.

Cum prope omnis civitas eo convenisset, docereturque paucis clam convocatis alio loco, alio tempore atque oportuerit fratrem a fratre renuntiatum, cum leges duo ex una familia vivo utroque non solum magistratus creari vetarent, sed etiam in senatu esse prohiberent, Cotum imperium deponere coegit, Convictolitavem, qui per sacerdotes more civitatis intermissis magistratibus esset creatus, potestatem obtinere iussit.

Discedentibus his breviter sua in Aeduos merita exposuit, quos et quam humiles accepisset, compulsos in oppida, multatos agris omnibus ereptis copiis, imposito stipendio, obsidibus summa cum contumelia extortis, et quam in fortunam quamque in amplitudinem deduxisset, ut non solum in pristinum statum redissent, sed omnium temporum dignitatem et gratiam antecessisse viderentur.

Fossam pedum viginti directis lateribus duxit, ut eius fossae solum tantundem pateret quantum summae fossae labra distarent.

Cum prope omnis civitas eo convenisset, docereturque paucis clam convocatis alio loco, alio tempore atque oportuerit fratrem a fratre renuntiatum, cum leges duo ex una familia vivo utroque non solum magistratus creari vetarent, sed etiam in senatu esse prohiberent, Cotum imperium deponere coegit, Convictolitavem, qui per sacerdotes more civitatis intermissis magistratibus esset creatus, potestatem obtinere iussit.

He treats the subject with remarkable accuracy: and after admitting that there cannot be any crime where there is no consent, he adds, Sed quia non solum quod ad dolorem, verum etiam quod ad libidinem, pertinet, in corpore alieno pepetrari potest.

The coco-palm in particular luxuriates in that stern solum, striking down his roots to the brackish, percolated water, and bearing his green head in the wind with every evidence of health and pleasure.

He was not aware of Monetre's quick hypnotic control of hysterical Bunny, nor of her calm flat voice revealing Zena's whereabouts, nor of Monetre's crackling command to Solum to go to the motor court and bring Zena back.