Ammendante

Niente fonti!
Questa voce o sezione sull'argomento agricoltura non cita le fonti necessarie o quelle presenti sono insufficienti.
Puoi migliorare questa voce aggiungendo citazioni da fonti attendibili secondo le linee guida sull'uso delle fonti.
Abbozzo agricoltura
Questa voce sull'argomento agricoltura è solo un abbozzo.
Contribuisci a migliorarla secondo le convenzioni di Wikipedia.

Gli ammendanti consistono in diverse sostanze, sia di origine naturale sia di origine sintetica, minerali e organiche, in grado di modificare e potenziare le caratteristiche chimiche, fisiche, biologiche e meccaniche di un terreno. Il loro impiego principale è quello di migliorare la struttura del terreno e mantenere la fertilità biologica del suolo.[1]

In un terreno sciolto l'apporto di sostanza organica (s.o.), fornita con una letamazione, con un sovescio, con la sansa o interrando i residui della coltura precedente, permette di ridurne i difetti quali la scarsa ritenzione di acqua e nutrienti. Anche le argille presenti in sospensione nelle acque torbide possono fungere da ammendanti; per utilizzarle occorre farle precipitare, fermando le acque dopo che queste abbiano sommerso l'appezzamento.

Nel caso si utilizzino ammendanti in un terreno pesante, compatto, essi vanno a migliorare la struttura.

Il prodotto ideale risulta essere il letame mediamente maturo. L'aggiunta di sabbia è estremamente onerosa, a causa delle ingenti quantità necessarie a permettere di osservare un apprezzabile miglioramento. Risulta praticabile unicamente nell'orticoltura di pregio e nella preparazione dei tappeti erbosi, più che altro negli stadi.

Anche una "calcitazione", nel caso che il terreno sia carente di calcio, può avere un effetto ammendante, grazie alla coagulazione dei colloidi argillosi che essa provoca. L'effetto è però apprezzabile solo dopo 2-3 anni. L'obiettivo deve essere quello di riportare il pH a 7.

Esistono sul mercato ammendanti sintetici che vanno a simulare l'azione dei polimeri organici, presentando però una maggiore resistenza agli attacchi da parte dei microrganismi. Tra questi si possono citare il Krilium, il VAMA (acido vinilacetatomaleico), il BMA. Funzionano bene, ma sono eccessivamente costosi. Il Flotal, a base di sali ferrici, è costoso e ne occorrono dosi elevate.

Note

  1. ^ Ammendanti organici, su www.crpa.it. URL consultato il 4 agosto 2023.

Voci correlate

Altri progetti

Controllo di autoritàLCCN (EN) sh85124328 · BNF (FR) cb122550706 (data) · J9U (EN, HE) 987007553402405171
  Portale Agricoltura: accedi alle voci di Wikipedia che trattano di agricoltura

Read other articles:

Nam ngiao

Nam ngiaoNam ngiao di kota Chiang Rai dengan berbagai jenis miNama lainNam ngeowJenisSup miTempat asalBagian ShanDaerahThailand Utara dan Negara bagian ShanSuhu penyajianPanasBahan utamaMi, daging sapi atau babi, tomatSunting kotak info • L • BBantuan penggunaan templat ini  Media: Nam ngiao Nam ngiao (bahasa Thai: น้ำเงี้ยว, pengucapan [ná(ː)m ŋía̯w]) atau nam ngio (bahasa Thai: น้ำงิ้ว, pengucapan [ná(ː)m ŋíw]...

 

 

Helmbrechts

Helmbrechts Gereja Martin Luther Lambang kebesaranLetak Helmbrechts di Hof NegaraJermanNegara bagianBayernWilayahOberfrankenKreisHofPemerintahan • MayorStefan Pöhlmann (SPD)Luas • Total58,66 km2 (2,265 sq mi)Ketinggian616 m (2,021 ft)Populasi (2013-12-31)[1] • Total8.533 • Kepadatan1,5/km2 (3,8/sq mi)Zona waktuWET/WMPET (UTC+1/+2)Kode pos95233Kode area telepon09252Pelat kendaraanHOSitus webwww.stadt-he...

 

 

Goliad Campaign

Goliad CampaignPart of the Texas RevolutionFort Defiance in Goliad, TexasDateFebruary 18 – March 27, 1836LocationTexas Gulf CoastResult Mexican victory which precipitated the Goliad MassacreBelligerents Mexican Republic Texian Rebels; later the Republic of TexasCommanders and leaders José de Urrea Frank JohnsonJames Grant †James Fannin †Amon B. King †William Ward †Strength 1,500 regulars, militia, and cavalry 500 9 cannonsCasualties and losses es...

Isulan

Capital of Sultan Kudarat, Philippines This article possibly contains original research. Please improve it by verifying the claims made and adding inline citations. Statements consisting only of original research should be removed. (May 2020) (Learn how and when to remove this template message) Municipality in Soccsksargen, PhilippinesIsulanMunicipalityMunicipality of IsulanIsulan Roundabout FlagSealNickname: Oil Palm Capital of the PhilippinesMotto: Buylog Isulan!Map of Sultan Kuda...

 

 

Sylvain Distin

Sylvain Distin Distin bermain untuk Manchester CityInformasi pribadiNama lengkap Sylvain Distin[1]Tanggal lahir 16 Desember 1977 (umur 46)[1]Tempat lahir Bagnolet, PrancisTinggi 1,93 m (6 ft 4 in) [2]Posisi bermain BekKarier senior*Tahun Tim Tampil (Gol)1997–1998 Joué-lès-Tours 32 (4)1998–1999 Tours 26 (3)1999–2000 Gueugnon 32 (1)2000–2002 Paris Saint-Germain 28 (0)2001–2002 → Newcastle United (pinjaman) 28 (0)2002–2007 Manchester C...

 

 

History of slavery in Kentucky

Mason County, Kentucky, slave pen now at the National Underground Railroad Freedom Center in Cincinnati, Ohio The history of slavery in Kentucky dates from the earliest permanent European settlements in the state, until the end of the Civil War. In 1830, enslaved African Americans represented 24 percent of Kentucky's population, a share that had declined to 19.5 percent by 1860, on the eve of the Civil War. Most enslaved people were concentrated in the cities of Louisville and Lexington and ...

Determinism

Philosophical view that events are determined by prior events This article is about the general notion of determinism in philosophy. For other uses, see Determinism (disambiguation). Not to be confused with Fatalism, Predeterminism, Predictability, or Theological determinism. Part of a series onPhilosophy  Philosophy portal Contents Outline Lists Glossary History Categories Disambiguation Philosophies By period Ancient Ancient Egyptian Ancient Greek Medieval Renaissance Modern Contem...

 

 

Raio Piiroja

Estonian footballer Raio PiirojaPersonal informationDate of birth (1979-07-11) 11 July 1979 (age 44)Place of birth Pärnu, EstoniaHeight 1.90 m (6 ft 3 in)Position(s) Centre-backYouth career Rivaal PärnuSenior career*Years Team Apps (Gls)1995–1996 Pärnu/Kalev 8 (1)1996–1997 Lelle 1997–1999 Lelle 22 (3)1999–2004 Flora 102 (17)2000 Tervis Pärnu 1 (0)2001 Valga 1 (0)2003 → Vålerenga (loan) 11 (1)2004–2011 Fredrikstad 159 (12)2011–2012 Vitesse 2 (0)2012 Flora...

 

 

Carl Löwenhielm

19th-century Swedish diplomat and nobleman For the 19th-century Swedish diplomat/artist, see Carl Gustaf Löwenhielm. Count Carl LöwenhielmBorn(1772-11-03)3 November 1772Stockholm, SwedenDied9 June 1861(1861-06-09) (aged 88)Stockholm, SwedenFatherCharles XIII of SwedenMotherAugusta von FersenOccupationMilitary officer, diplomat, politician Count Carl Axel Löwenhielm (3 November 1772 – 9 June 1861) was a Swedish military officer, diplomat, and politician.[1][2] He was ...

Gerald W. Johnson (military officer)

United States Air Force general Gerald Walter JohnsonNickname(s)JerryBorn(1919-07-10)10 July 1919Owenton, Kentucky, U.S.Died9 September 2002(2002-09-09) (aged 83)St. Petersburg, Florida, U.S.BuriedArlington National CemeteryAllegianceUnited States of AmericaService/branch United States Army Air Corps United States Army Air Forces United States Air ForceYears of service1941–1974Rank Lieutenant GeneralUnit56th Fighter GroupCommands held63d Fighter Squadron508th Strategic Fighte...

 

 

Kirk Jones (director)

English film director and screenwriter This biography of a living person needs additional citations for verification. Please help by adding reliable sources. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately from the article and its talk page, especially if potentially libelous.Find sources: Kirk Jones director – news · newspapers · books · scholar · JSTOR (February 2016) (Learn how and when ...

 

 

The Malaise of Modernity

1991 book by Charles Taylor The Malaise of Modernity Cover of a House of Anansi Press editionAuthorCharles TaylorCountryCanadaLanguageEnglishSubjectEthicssocial philosophyPublisherHouse of Anansi PressHarvard University PressPublication date1991Media typePrintdigitalPages135ISBN978-0-88784-520-8LC ClassBF637.S4 T39 The Malaise of Modernity is a book by the Canadian philosopher Charles Taylor based on his 1991 Massey Lecture of the same title.[1][2] Originally publish...

Włochy na Letnich Igrzyskach Olimpijskich 2000

Włochy na Letnich Igrzyskach Olimpijskich 2000 Kod MKOl ITA Letnie Igrzyska Olimpijskie 2000Sydney Chorąży Carlton Myers Liczba zawodników 361 w 29 dyscyplinach MedalePozycja: 7. Złoto13 Srebro8 Brąz13 Razem34 Włochy na Letnich Igrzyskach Olimpijskich 2000 reprezentowało 361 zawodników, 246 mężczyzn i 115 kobiet. Zdobyte medale Medal Zawodnik Dyscyplina Konkurencja Złoto Domenico Fioravanti Pływanie 100 m stylem klasycznym Złoto Domenico Fioravanti Pływanie 200 m stylem k...

 

 

BASF

German chemicals company This article is about the German company. For the French-owned company spun off from the BASF magnetic tape division, see EMTEC. For other uses, see BASF (disambiguation). BASF SECompany typePublic (Societas Europaea)Traded asFWB: BASDAX componentISINDE000BASF111IndustryChemicalsPredecessorKnoll AG Chemische FabrikenZuckerfabrik KörbisdorfHerbol Founded6 April 1865; 159 years ago (6 April 1865) (as Badische Anilin- und Sodafabrik); Mannheim, Ba...

 

 

Grimsby

Town in Lincolnshire, England This article is about the town in England. For other uses, see Grimsby (disambiguation). Human settlement in EnglandGrimsbyLeft to right, top: the Town HallMiddle: St James's Minster, the Dock TowerBottom: Victoria Street West and Corporation BridgeGrimsbyLocation within LincolnshirePopulation86,138 (2021 Census)[1]OS grid referenceTA279087• London140 mi (230 km) SUnitary authorityNorth East LincolnshireCeremonial...

Aujourd'hui Le Maroc

Moroccan daily francophone newspaper Aujourd'hui Le MarocTypeDaily newspaperPublisherALM PublishingFounded2001; 23 years ago (2001)LanguageFrenchHeadquartersCasablancaWebsiteaujourdhui.ma Aujourd'hui Le Maroc is a daily francophone Moroccan newspaper. It is a general-information and politically independent newspaper. History and profile Aujourd'hui Le Maroc was first published in 2001 by ALM Publishing.[1][2] The paper was founded by Khalil Hachimi Idrissi, w...

 

 

Diagramme de Minkowski

Diagramme de Minkowski représentant un événement E avec ses coordonnées d'espace-temps (x,ct) dans un référentiel R, et celles (x', ct') dans un référentiel R' en déplacement par rapport au premier à la vitesse v ; ainsi qu'un des axes du cône de lumière, en rouge. L'unité des graduations sur les axes de R' sont notées 1' sur chacun. Le diagramme de Minkowski est une représentation de l'espace-temps développée en 1908 par Hermann Minkowski[1], permettant une visualisatio...

 

 

Bourgougnague

BourgougnaguecomuneBourgougnague – Veduta LocalizzazioneStato Francia Regione Nuova Aquitania Dipartimento Lot e Garonna ArrondissementMarmande CantoneLe Val du Dropt TerritorioCoordinate44°37′N 0°25′E44°37′N, 0°25′E (Bourgougnague) Altitudine190 m s.l.m. Superficie11,64 km² Abitanti353[1] (2009) Densità30,33 ab./km² Altre informazioniCod. postale47410 Fuso orarioUTC+1 Codice INSEE47035 CartografiaBourgougnague Sito istituzionaleModifica ...

بي إن جي (صيغة ملفات)

بي إن جيصورة نرد (زهر) بصيغة PNGامتداد الملف pngصيغة وسائط الإنترنت image/png[1]توقيع الملف/عدد سحري 89504E470D0A1A0Aأول إصدار 1 أكتوبر 1996امتدّ لـ خوارزمية الانكماش[1]المعايير 15948مواقع الويب libpng.org…[2] (الإنجليزية)png-mng.sourceforge.net… (الإنجليزية) تعديل - تعديل مصدري - تعديل ويكي بيانا�...

 

 

Levi P. Morton

Levi P. MortonPhó Tổng thống thứ 22 của Hoa KỳNhiệm kỳ4 tháng 3 năm 1889 – 4 tháng 3 năm 18934 năm, 0 ngàyTổng thốngBenjamin HarrisonTiền nhiệmThomas A. HendricksKế nhiệmAdlai StevensonThống đốc bang New York thứ 31Nhiệm kỳ1 tháng 1 năm 1895 – 31 tháng 12 năm 1896Phó Thống đốcCharles T. SaxtonTiền nhiệmRoswell P. FlowerKế nhiệmFrank S. BlackĐại sứ Hoa Kỳ tại PhápNhiệm kỳ5 tháng 8 năm ...