Mor soils are usually acidic (low pH) and are characteristic of coniferous forest areas, especially in cold regions and at high altitudes. The humus tends to decompose quickly and mix thoroughly with the minerals soil. definition of Wikipedia. A mull-humus formation is characteristic of hardwood forests, deciduous forests, or grasslands in warm, humid climates. Matière colloïdale du sol issue de la décomposition et de la transformation chimique et biologique des débris végétaux. Die Umwandlung von Streustoffen in Huminstoffe nennt man Humifizierung (Stahr et. al. The porous, crumbly humus rapidly decomposes and becomes well mixed into the mineral soil, so that distinct layers are not apparent. A moder-humus formation is intermediate between mor and mull extremes. Definitions of Humus, synonyms, antonyms, derivatives of Humus, analogical dictionary of Humus (Swedish) Search mull and thousands of other words in English definition and synonym dictionary from Reverso. Humus im Wörterbuch: Bedeutung, Definition, Synonyme, Übersetzung, Herkunft, Rechtschreibung, Beispiele. As an adjective, the word is used to indicate something which is bare, dull, or bald. A moder formation contains more organic material than a mull formation, but this material is not as well mixed with mineral components. Mixed mainly through the activities of earthworms. This solid, dark-coloured component of soil plays a significant role in the control of soil acidity, in the cycling of nutrients, and in the detoxification of hazardous compounds. …be lightened with as much humus as can be dug into them. Cherchez mull et beaucoup d’autres mots dans le dictionnaire de définition et synonymes français de Reverso. © 2012 - CNRTL 44, avenue de la Libération BP 30687 54063 Nancy Cedex - France Tél. https://www.britannica.com/science/mull-geology. As humus decomposes, its components are changed into forms usable by plants. How to use mull in a sentence. 11. the decomposed organic element of the soil. This solid, dark-coloured component of soil plays a significant role in the control of soil... Get exclusive access to content from our 1768 First Edition with your subscription. v.intr. - La présence d`une importante pédofaune riche en particulier en vers de terre et en macroarthropodes (diplopodes, cloportes) assure une incorporation rapide de la litière. High This article has been rated as High-importance on the project's importance scale. definition - Mull. oxforddictionaries .com /definition /english /mull--2. mull [entry 3] humus formed under non-acid conditions (5 of 38 words, pronunciation) oxforddictionaries .com /definition /english /mull--3. mull [entry 4] The turnover rate for humus ranges from 2 to 5% per year, depending on climatic conditions (Wagner and Wolf, 1998).This can be compared with the degradation of lignin shown in Figure 16.8A, where approximately 50% of lignin added to a silt loam was degraded in 250 days. (1) Connecting cover boards to the mull , rather than directly to the signatures themselves, allows for a strong but flexible backbone. For example, in…. humus /ˈhjuːməs/ Definitions. (1) Connecting cover boards to the mull , rather than directly to the signatures themselves, allows for a strong but flexible backbone. Wortherkunft. Variations in soil materials and fertility have a strong influence on the types of trees that will dominate the forest. Friable forest humus that forms a layer of mixed organic matter and mineral soil and merges gradually into the mineral soil beneath. (Physical Geography) a layer of nonacidic humus formed in well drained and aerated soils. 1; transitive verb mull heat and spice: wine 1; transitive verb mull think about 1 earthworms). Chief town: Tobermory. mi. Thus, Mull became a colloquialism. Humus, which ranges in colour from brown to black, consists of about 60 percent carbon, 6 percent nitrogen, and smaller amounts of phosphorus and sulfur. verb without object mull to study or ruminate; ponder. (2) Those woods with brown forest soils maintained mull humus, probably by virtue of their mixed floristic composition. Er besteht aus allen Umwandlungsprodukten der Streu, die eine amorphe, makromolekulare Form haben. Mull definition: If you mull something, you think about it for a long time before deciding what to do. An island of western Scotland in the Inner Hebrides. Mull humus we characterized as alkaline or having a high pH level. humus, jord, mylla. L 'humus (prononciation italien / UMUS /; de latin humus, "Le sol, la terre, la terre"), adapté parfois humo, Il est un élément chimique de la sol. Bacteria, earthworms, and larger insects are abundant, and the…. 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. 1. Humus is black and colloidal in nature, coa Advertizing ... Il mull calcico si forma in suoli calcarei, soggetti a variazioni stagionali dell'umidità e con vegetazione rappresentata principalmente da essenze erbacee. mull [4] n a layer of nonacidic humus formed in well drained and aerated soils Compare → mor (C20: from Danish muld; see mould3) Is identified both as an independent horizon in some soils, or in the clay-humus complex. Humus formés en aérobiose : Le mull, avec une bonne incorporation de la matière organique et de la matière minérale réalisée principalement par les vers de terre, présent dans les forêts à activité biologique intense et les prairies. Define mull. Il a une structure fibreuse ou feuilletée. Pop: 2667 (2001). Humus is within the scope of WikiProject Soil, which collaborates on Soil and related articles on Wikipedia. ing, mulls v.tr. Mull definition is - to grind or mix thoroughly : pulverize. Mull is a type of humus which occurs in soils under cultivation. …partially decomposed biomass, is called humus. 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 … (910 sq. A soft fine sheer fabric of cotton, silk, or rayon.. 3. 1; verb with object mull to mix (clay and sand) under a roller for use in preparing a mold. Compare mor [C20: from Danish muld; see mould 3] mull (mʌl) n Humus is black and colloidal in nature, coa A mull-humus formation is characteristic of hardwood forests, deciduous forests, or grasslands in warm, humid climates. Acidic humus (mor) is found in regions of coniferous forest, where the decay is brought about mainly by fungi. A mor-humus formation, or raw humus condition, occurs in soil that has few micro- organisms or animals, such as earthworms, to decompose the organic matter that lies on the soil surface. Fungi and small arthropods are the most common organisms. Exemples : - l'anmoor (anmoor) : humus foncé, gras au toucher, boueux s'il est humide. Advertizing synonyms - Mull report a problem. Updates? The humus tends to decompose quickly and mix thoroughly with the minerals soil. See more. Dessa djur åstadkommer då ordentlig omblandning [1] av jorden.. Daggmaskens gångar förbättrar också syrgasutbytet längre ner i marken, varpå risken för syrgasbrist minskar. | Meaning, pronunciation, translations and examples La succession est de type OLn, OLv, OF/A. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. : +33 3 83 96 21 76 - Fax : +33 3 83 97 24 56 to mull definition, meaning, English dictionary, synonym, see also 'Mull',mulla',mullah',muller', Reverso dictionary, English definition, English vocabulary (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. mi. Mixed mainly through the activities of earthworms. …sediment and sedimentary rocks is humus, plant matter that accumulates in soil. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. If you would like to participate, you can choose to edit this article, or visit the project page for more information. Mull är en form av humus [1] (de andra formerna är mår, torv och dy).Mull skiljer sig från mår genom ett högre pH-värde och en högre basmättnadsgrad, där daggmaskar och andra grävande djur frodas. A mull-humus formation is characteristic of hardwood forests, deciduous forests, or grasslands in warm, humid climates. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. - l'humus brut, mor (mor) : humus à évolution lente formé en milieu acide. definition - Humus. humus in English translation and definition "humus", Dictionary English-English online. https://www.britannica.com/science/humus-soil-component. Omissions? 1; noun mull Humus formed under nonacid conditions. humus /ˈhjuːməs/ Definitions. Humus, nonliving, finely divided organic matter in soil, derived from microbial decomposition of plant and animal substances. 2 : a finely powdered solid … In humus. 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. verb without object mull to study or ruminate; ponder. The porous, crumbly humus rapidly decomposes and becomes well mixed into the mineral soil, so that distinct layers are not apparent. (2) Those woods with brown forest soils maintained mull humus, probably by virtue of their mixed floristic composition. Mull kommt aus mittelniederdeutsch mul, „lockerer Humusboden“ (vgl. Définitions de humus. About 351 sq. Erhalten hat sich das Wort außer im Fachausdruck in der volkstümlichen Bezeichnung Mulle für Maulwürfe und den Namen für andere ähnlich im Boden lebenden Arten; siehe Mulle. - le moder (moder, amphimull) : humus foncé dans lequel les débris de végétaux sont à des stades de décomposition très différents. Corrections? Détails. Mull humus harbours many bacteria and invertebrate animals such as earthworms. In this humus predominate humic acids, thus humic acid/fulvic acid ratio is below 1. Australian slang for cannabis. Accumulation à la surface du sol minéral de matériaux organiques légèrement décomposés et à réaction acide (d'apr. to mull definition, meaning, English dictionary, synonym, see also 'Mull',mulla',mullah',muller', Reverso dictionary, English definition, English vocabulary ‘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.’ The porous, crumbly humus rapidly decomposes and becomes well mixed into the mineral soil, so that distinct layers are not apparent. A mull-humus formation is characteristic of hardwood forests, deciduous forests, or grasslands in warm, humid climates. To think about extensively; ponder. The porous, crumbly humus rapidly decomposes and becomes well mixed into the mineral soil, so that distinct layers are not apparent. The turnover rate for humus ranges from 2 to 5% per year, depending on climatic conditions (Wagner and Wolf, 1998).This can be compared with the degradation of lignin shown in Figure 16.8A, where approximately 50% of lignin added to a silt loam was degraded in 250 days. (1) Mor humus: This is non-porous and friable humus. Our editors will review what you’ve submitted and determine whether to revise the article. Compare mor. | Meaning, pronunciation, translations and examples en.wiktionary.org. Learn more. (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. km). oxforddictionaries .com /definition /english /mull--2. mull [entry 3] humus formed under non-acid conditions (5 of 38 words, pronunciation) oxforddictionaries .com /definition /english /mull--3. mull [entry 4] ‘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.’ It is brown in colour and found in the forest soil. Comparaison entre mull (à gauche) et moder (à droite), deux formes différentes d'humus. It has very less number of micro-organisms. 1; verb with object mull to mix (clay and sand) under a roller for use in preparing a mold. A soft thin muslin used in dresses and for trimmings.. 2. It is usually dark in colour and comes in two forms, mor which is highly acidic, and mull which is much milder. About 351 sq. Definitions of Humus, synonyms, antonyms, derivatives of Humus, analogical dictionary of Humus (Swedish) Humus … Moder is sometimes known as insect mull because its distinguishing characteristic is the presence of many arthropod fecal pellets. mull synonyms, mull pronunciation, mull translation, English dictionary definition of mull. mull definition: 1. to heat wine or beer with added sugar and spices: 2. to heat wine or beer with added sugar and…. 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. Dans les sols dégradés l'humus se décompose très lentement, il devient un humus brut acide qui forme une épaisse couche superficielle que l'on … humus the organic material that is derived from the breakdown of plant and animal material occurring in the surface layers of the soil. Start This article has been rated as Start-Class on the project's quality scale. Humus is valued by farmers and gardeners because it provides nutrients essential for plant growth, increases soil water absorption, and improves soil workability. I stofft och sand then swarta mull • Martin Mull • Mull Hill • Mull of Kintyre • O.F.Müll. Rohhumus, Humusform von Böden mit 5 bis >30 cm mächtigem Auflagehumus aus L-Horizont, Of- Horizont und Oh-Horizont. Is identified both as an independent horizon in some soils, or in the clay-humus complex. Chains of these pellets bind plant debris and mineral particles together into a netlike structure. Den Hauptteil der organischen Fraktion des Bodens bildet Humus. Compare mor. Humus – Definition. (910 sq. Below this surface-litter layer is a distinct, strongly compacted humus layer; a layer of mineral soil underlies the humus. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... …partially decomposed biomass, is called humus. 2016, S. 65). Alkaline humus (mull) is typically found in grassland and deciduous forest: it supports an abundance of microorganisms and small animals (e.g. According to Kononova, the types of humus are divide as follows: First type of humus is characteristic for podzolic soils, grey brown soils and lateric soils under forest communities. Bacteria, earthworms, and larger insects are abundant, and the…. In the 1970s there was a strain of cannabis grown in Northern NSW called Mullumbimby Madness. Le mor est un type d’humus qui se forme en milieu oxygéné (en aérobiose). Mull im Wörterbuch: Bedeutung, Definition, Synonyme, Übersetzung, Herkunft, Rechtschreibung, Beispiele, Silbentrennung, Aussprache. 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. Humus is the most complex organic molecule found in soil, and as a result it is the most stable organic molecule. Finally, the moder humus lies in between the two extremes of the mor and mull humus. Cherchez mull et beaucoup d’autres mots dans le dictionnaire de définitions en anglais de Reverso. Humus is black and colloidal in nature, coa Mull Le mull est un humus formé en aérobiose. a mountainous island off the west coast of Scotland, in the Inner Hebrides, separated from the mainland by the Sound of Mull. L’humus, désigne la couche supérieure du sol créée et entretenue par la décomposition de la matière organique, essentiellement par l'action combinée des animaux, des bactéries et des champignons du sol. It is black in colour and generally contains the majority of members of Ericaceae and mosses. Métro 1975). Il est pedologicamente homogène, brun et formé par des degrés divers de produits de polymérisation, le résultat de la dégradation et de reprise matière organique du sol.Il est un complexe de substances organiques présentes dans le sol. km). Humus definition, the dark organic material in soils, produced by the decomposition of vegetable or animal matter and essential to the fertility of the earth. 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 … ... (Physical Geography) a layer of nonacidic humus formed in well drained and aerated soils. It lacks earthworms and possesses less number of microorganisms. ♦ Humus acide/brut. humus the organic material that is derived from the breakdown of plant and animal material occurring in the surface layers of the soil. (2) Mull humus: It is porous. 1; noun mull Humus formed under nonacid conditions. Cet humus forme une transition avec les moders (rapprochement avec le " mull-moders " de l'ancienne terminologie) ou avec les amphimulls. mull (n.) humus, jord, mylla. Moder humus is also referred to as insect mull because it contains a lot of arthropod fecal matter. Other important organic constituents include peat, humic organic matter that collects in bogs and swamps where oxidation and bacterial decay is incomplete, and sapropel, fine-grained organic material—mainly the soft organic tissue of phytoplankton and zooplankton, along with bits…. , the moder humus lies in between the two extremes of the mor and mull.! 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Mull kommt aus mittelniederdeutsch mul, „ lockerer Humusboden “ ( vgl its components are changed into usable. Humic acids, thus humic acid/fulvic acid ratio is below 1 (,! Definition: if you would like to participate, you are agreeing to news,,!.. 2 humus as can be dug into them soils maintained mull humus characterized... Swedish ) Définitions de humus importance scale fecal matter mull est un type d ’ autres mots le! Humus – definition is found in the surface layers of the mor and mull humus we characterized alkaline! You can choose to edit this article has been rated as High-importance on the lookout for your Britannica newsletter get... Is not as well mixed with mineral components nennt man Humifizierung ( Stahr et visit the project page for information. Forest, where the decay is brought about mainly by fungi brut mor... And definition `` humus '', dictionary English-English online to get trusted stories delivered right to your inbox deux! Arthropods are the most common organisms, English dictionary definition of mull mountainous island off the coast... Ensemble des matières organiques se trouvant dans la couche superficielle d'un sol Il mull si! Cannabis grown in Northern NSW called Mullumbimby Madness auch in Mühle, Müller steckt not apparent is brought about by... Surface layers of the soil trimmings.. 2 forme en milieu acide decomposition of plant and animal substances l'humus,... Animals such as earthworms, offers, and larger insects are abundant, the. Mull kommt aus mittelniederdeutsch mul, „ lockerer Humusboden “ ( vgl L-Horizont, Of- Horizont und Oh-Horizont qui forme. Island in the forest soil so that distinct layers are not apparent '', dictionary English-English online mull calcico forma! Result it is usually dark in colour and comes in two forms, mor which is highly acidic and. Ensemble des matières organiques se trouvant dans la couche superficielle d'un sol of,!