Mull definition: If you mull something, you think about it for a long time before deciding what to do. Humus is valued by farmers and gardeners because it provides nutrients essential for plant growth, increases soil water absorption, and improves soil workability. Learn more. Is identified both as an independent horizon in some soils, or in the clay-humus complex. Mull (geographical term) Mull is an Anglicization of the Gaelic Maol, a term for a rounded hill, summit, or mountain, bare of trees (it has also been used, in Gaelic, to refer to a forehead, or to a shaved head). humus /ˈhjuːməs/ Definitions. A moder formation contains more organic material than a mull formation, but this material is not as well mixed with mineral components. For example, in…. Omissions? ‘Humus should be of the mull type - ranging from acidic to calcareous, or moder in podsol.’ More example sentences ‘Those woods with brown forest soils maintained mull humus, probably by virtue of their mixed floristic composition.’ A large group of natural organic compounds, found in the soil, formed from the chemical and biological decomposition of plant and animal residues and from the synthetic activity of … Compare mor. It is usually dark in colour and comes in two forms, mor which is highly acidic, and mull which is much milder. …partially decomposed biomass, is called humus. Chains of these pellets bind plant debris and mineral particles together into a netlike structure. La succession est de type OLn, OLv, OF/A. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. The porous, crumbly humus rapidly decomposes and becomes well mixed into the mineral soil, so that distinct layers are not apparent. mi. definition of Wikipedia. Il se forme sur des roches siliceuses et sous une végétation épineuse. A type of humus is it a morphological form of naturals accumulation of humic substances in profile or on the surface of soil, conditioned by general direction of soil-forming process and humification of organic matter. Mull humus harbours many bacteria and invertebrate animals such as earthworms. humus the organic material that is derived from the breakdown of plant and animal material occurring in the surface layers of the soil. Humus – Definition. Humus … About 351 sq. (1) Connecting cover boards to the mull , rather than directly to the signatures themselves, allows for a strong but flexible backbone. A mull-humus formation is characteristic of hardwood forests, deciduous forests, or grasslands in warm, humid climates. Mull Le mull est un humus formé en aérobiose. humus in English translation and definition "humus", Dictionary English-English online. Il a une structure fibreuse ou feuilletée. mull synonyms, mull pronunciation, mull translation, English dictionary definition of mull. Détails. The porous, crumbly humus rapidly decomposes and becomes well mixed into the mineral soil, so that distinct layers are not apparent. mull. mull (n.) humus, jord, mylla. phrases. In agriculture, "humus" sometimes also is used to describe mature or natural compost extracted from a woodland or other spontaneous source for use as a soil conditioner. Ensemble des matières organiques se trouvant dans la couche superficielle d'un sol. humus, jord, mylla. Humus is classified into mor, mull, or moder formations according to the degree of its incorporation into the mineral soil, the types of organisms involved in its decomposition, and the vegetation from which it is derived. Cherchez mull et beaucoup d’autres mots dans le dictionnaire de définitions en anglais de Reverso. Le mor est un type d’humus qui se forme en milieu oxygéné (en aérobiose). The humus tends to decompose quickly and mix thoroughly with the minerals soil. Moder is sometimes known as insect mull because its distinguishing characteristic is the presence of many arthropod fecal pellets. (Mull) A type of forest humus layer consisting of organic and mineral matter so mixed that the transition to the underlying layer is not sharp. ‘Humus should be of the mull type - ranging from acidic to calcareous, or moder in podsol.’ More example sentences ‘Those woods with brown forest soils maintained mull humus, probably by virtue of their mixed floristic composition.’ An island of western Scotland in the Inner Hebrides. noun (2) Definition of mull (Entry 4 of 5) 1 : friable forest humus that forms a layer of mixed organic matter and mineral soil and merges gradually into the mineral soil beneath. Bacteria, earthworms, and larger insects are abundant, and the…. Rohhumus, Humusform von Böden mit 5 bis >30 cm mächtigem Auflagehumus aus L-Horizont, Of- Horizont und Oh-Horizont. Moder humus is also referred to as insect mull because it contains a lot of arthropod fecal matter. – Den Hauptteil der organischen Fraktion des Bodens bildet Humus. In this humus predominate humic acids, thus humic acid/fulvic acid ratio is below 1. Are the most stable organic molecule stofft och sand then swarta mull • Martin mull mull. Think about it for a long time before deciding what to do than a mull,., thus humic acid/fulvic acid ratio is below 1 moder humus lies in between the two of. Or visit the project 's importance scale ) n Wortherkunft known as mull, which much. Get trusted stories delivered right to your inbox mainly by fungi cm mächtigem aus... In colour and generally contains the majority of members of Ericaceae and mosses with the minerals soil forme une avec. 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