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MK. DASAR ILMU TANAH. Smno.jursntnh.fpub.febr2014

PROFIL TANAH. Foto : smno.kampus.ub.janu2013. MK. DASAR ILMU TANAH. Smno.jursntnh.fpub.febr2014. BEBERAPA ISTILAH ….…. Colloidal : submikroskopis humus dan liat adalah koloidal Humus : ultimate stage of organic decay predominately protein, gums, lignin

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MK. DASAR ILMU TANAH. Smno.jursntnh.fpub.febr2014

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  1. PROFIL TANAH Foto: smno.kampus.ub.janu2013 MK. DASAR ILMU TANAH. Smno.jursntnh.fpub.febr2014

  2. BEBERAPA ISTILAH ….… • Colloidal : submikroskopis • humus danliatadalahkoloidal • Humus: ultimate stage of organic decay • predominately protein, gums, lignin • Sesquioxides: 1½ oksigenuntukmasing-masing Fe, Al • sesquioksidadari Fe, Al: Fe2O3 Al2O3 DIUNDUH DARI: www.d.umn.edu/~pfarrell/Soils/powerpoints/profile.ppt ……. 10/2/2013

  3. HORISON ORGANIK Horison O : Bahanorganik ( tidakadabahan mineral) 1) Seresahlantaihutan 2) Tanah organic atautanahgambut Oi- Tidakterlapuk (fibris) Oe– Terlapuksedang(hemis) Oa - terlapuklanjut(sapric) Diunduhdari: www.swac.umn.edu/classes/soil2125/lecture%20pp/l03a.ppt …. 10/2/2013

  4. PROSES PEMBENTUKAN HORISON TANAH MINERAL • A. Penambahan: H2O, bahanorganik, Partikeltanah, garam-garam • B. Kehilangan; H2O, bahanorganik, CO2 , unsurhara yang diseraptanaman • C. Transformasi: Perubahanstrukturtanah, Perkembangan mineral liat, Pelapukan mineral menjadiunsurdnasenyawakimia • D. Translokasi: pergerakanbahanorganik, liat, air, besidanharadalambentukkoloidal , darisatuhorisonkehorisonlainnya. • Selaputliatpada “agregat” tanahmerupakanbuktiprosestranslokasiliat. Diunduhdari: www.swac.umn.edu/classes/soil2125/lecture%20pp/l03a.ppt …. 10/2/2013

  5. HORISON TANAH MINERAL • Horison A - Horisonpermukaan , akumulasibahanorganik • Ap = Lapisanolahtanah Ap EB Bt Ap BC C Diunduhdari: www.swac.umn.edu/classes/soil2125/lecture%20pp/l03a.ppt …. 10/2/2013

  6. HORISON E A E E/B Bt BC C Horison E (semulaberupahorison A2) : – Translokasikeluar • Zone Eluviasi • Pencuciankeluar Warnanyalebihterangdibandingkandneganhorisondiatasataudibawahnya Diunduhdari: www.swac.umn.edu/classes/soil2125/lecture%20pp/l03a.ppt …. 10/2/2013

  7. DuamacamHorison B : • Translokasimasuk: Beradadibawahhorison A, E, atau O denganakumulasiliat, besi, humus (bahanorganikterlapuk), ataukarbonat(CaCO3) Zone illuviasi (b) Ataualterasibahaninduk, perkembanganwarnaataustruktur - Bw Bt Diunduhdari: www.swac.umn.edu/classes/soil2125/lecture%20pp/l03a.ppt …. 10/2/2013

  8. HORISON C Horison C : Hanyasedikitsekaliterpengaruhiolehproses-prosespedogenesisdantidakmempunyaisifat-sifathorison O-A-B-E- atauberupaBahanInduk Tanah Solum = A + B C horizon Diunduhdari: www.swac.umn.edu/classes/soil2125/lecture%20pp/l03a.ppt …. 10/2/2013

  9. HORISON BATUAN • R = Batuankeras • Cr = Batuanlunak Diunduhdari: www.swac.umn.edu/classes/soil2125/lecture%20pp/l03a.ppt …. 10/2/2013

  10. HurufIndeks: Semuahorison B mempunyaisuatuhurufindeks, kebanyakanhorisontransisitidakmempunyaiindeks.* = pentinguntuk MN • * a - sapric– tanahorganik – terdekomposisi dg baik • * b – horisontanah yang terkubur • d - dense - geogenic soil material (compacted by glacier) • * e - hemic– dekomposisimoderat. – tanahorganik • f - frozen soil – beku permanent, permafrost • * g - gleyed soil – warnakelabukarenamiskin O2 – reduksi Fe • * h – akumulasi humus - BO selaindidalamhorison A atauO • * i - fibric - organik – tidakterdekomposisi • * k – akumulasikalsiumkarbonat (CaCO3) • * m – sementasi - keras- kompak Diunduhdari: www.swac.umn.edu/classes/soil2125/lecture%20pp/l03a.ppt …. 10/2/2013

  11. Huruf Indeks: Semua horison B mempunyai suatu huruf indeks, kebanyakan horison transisi tidak mempunyai indeks.* = penting untuk MN n – Akumulasi Na * p - Pengolahantanah – hanyauntukhorison A q - silica accumulation – tanahtua, pelapukanlanjut * r - Batuanlunak - untukhorison C atauCr * s - sesquioxides (1.502) (Fe2O3) accumulation of Fe and Al - red color *ss – slickensides present –shiny surface on ped face caused from soil rubbing against soil * t – akumulasiliat – selaputliat * w – perkembanganwarnaataustruktur (Bw) x - Fragipan– lapisankeras, padat, yang berkembangdneganwaktu y – akumulasi gypsum (CaSO4) z – garamlebihmudahlarutdaripadagipsum (KCL - NaCl - NaSO4) Diunduhdari: www.swac.umn.edu/classes/soil2125/lecture%20pp/l03a.ppt …. 10/2/2013

  12. HORISON TRANSISI • AB - Like A - some of B • BA - Like B - some of A • AE AC BC • E/B - Both E and B particles are present - • “B & E” used for soils with Lamellae - thin bands of accumulating clay and iron in sandy soils Diunduhdari: www.swac.umn.edu/classes/soil2125/lecture%20pp/l03a.ppt …. 10/2/2013

  13. DISKONTINYUITAS LITOLOGIS • A • Bw1 • Bw2 • 2C • L.D. is designated by number in front of horizon = more than one parent material Loamy Mantle 2 parent materials Outwash Diunduhdari: www.swac.umn.edu/classes/soil2125/lecture%20pp/l03a.ppt …. 10/2/2013

  14. DESKRIPSI HORISON TANAH • Pengenalan Horizon dandimensinya • Warna Tanah • Komponen – Partikel primer • Organisasipertikel primer • Rongga – pori - porositas • Konsentrasi • AktivitasBiologis • Reaksi / Kemasamantanah • Samples Sumber: Soil Profile Description. Otto Spaargaren. ISRIC-World Soil Information. Wageningen The Netherlands

  15. DESKRIPSI HORISON TANAH • Simbol Horizon – Nomenklaturhorisonutama H, O, A, E, B, C dan R, dankarakteristik subordinate didalamhorisonutama • Batas Horizon – kedalaman, kejelasandantopografi Sumber: Soil Profile Description. Otto Spaargaren. ISRIC-World Soil Information. Wageningen The Netherlands

  16. Pengenalanhorisonutama HorisonOrganik: HatauO H = basah - wet O = kering - dry DESKRIPSI HORISON TANAH Sumber: Soil Profile Description. Otto Spaargaren. ISRIC-World Soil Information. Wageningen The Netherlands

  17. Pengenalanhorisonutama Horison Mineral: A(bahanorganik) E (eluviasi) B (iluviasi) C(bahaninduk, tidak-padu) DESKRIPSI HORISON TANAH Sumber: Soil Profile Description. Otto Spaargaren. ISRIC-World Soil Information. Wageningen The Netherlands

  18. Pengenalanhorisonutama Horison Mineral: R(batuaninduk) DESKRIPSI HORISON TANAH Sumber: Soil Profile Description. Otto Spaargaren. ISRIC-World Soil Information. Wageningen The Netherlands

  19. DESKRIPSI PROFIL TANAH ………. Selanjutnya ….…. Diunduhdari: http://blog.ub.ac.id/mastertommy/files/2013/01/panduan_deskripsi.pdf …. 13/2/2013

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