...Higher still is the bank of yellow clay, capped with shallow humus... 
Richard F. Burton 「Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2」
...Mangrove, that horror of the African voyager, shines by its absence; and the soil is not mud, but humus based on gravels or on ruddy clays, stiff and retentive...
Richard F. Burton 「Two Trips to Gorilla Land and the Cataracts of the Congo Volume 1」
...Baker (1951:218) reported that specimens from the type locality weretaken in crevices among rocks on a small hillside that supported asparse cover of vegetation growing from a deep layer of humus...
Ticul Alvarez 「The Recent Mammals of Tamaulipas, Mexico」
...The humus is rarely more than a few centimeters deep, and consequently cornfields (milpas) must be moved every two or three years...
Erwin E. Klaas 「Summer Birds From the Yucatan Peninsula」
...These wood rats were taken in rocks and crevices at the base ofa small hill in thick vegetation growing in deep humus...
Rollin H. Baker 「Mammals from Tamaulipas, Mexico」
...The soil is usually damp, with thick leaflitter and rich humus...
Henry S. Fitch 「The Forest Habitat of the University of Kansas Natural History Reservation」
...The upper few inches of soil is humus rich in organic matter; below this is clay...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...carolina tend to seek shelter in the warm season by makingforms in dense vegetation or by digging into yielding substratasuch as mud or humus, although they may burrow deeply into theearth in winter...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...The soil consists of a rich black humus that is soft and mellowexcept during the period of greatest dryness, being overlain by a varying depth of vegetabledebris and leaf-mold...
Horace Gunthorp 「Journal of Entomology and Zoology」
...On this small tract more than half the rock is bare, withscanty patches of soil and humus in the crevices and on flat places...
Gerard Fowke 「Archeological Investigations」
...The last is due to top soil containing a largeamount of humus from decaying vegetation...
Gerard Fowke 「Archeological Investigations」
...It is beyond question that any soil, humus, or other discolored matterthrown into an excavation with ordinary soil or subsoil will beapparent for an indefinite time afterwards...
Gerard Fowke 「Archeological Investigations」
...The hard and compact humus of whichthe soil of the Nile valley is composed, contracts every year after thesubsidence of the inundation, and thus becomes almost incompressible...
Gaston Camille Charles Maspero 「Manual Of Egyptian Archaeology And Guide To The Study Of Antiquities In Egypt」
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