soilfile.upi.edu/direktori/fpmipa/jur._pend._biologi/196607161991011... · tekstur tanah proporsi...
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SOIL
KOMPONEN TANAH :
- MINERAL
- MATERI ORGANIK
- AIR
- UDARA
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PEMBENTUKAN TANAH
MECHANICAL WEATHERING
CHEMICAL WEATHERING
DIPENGARUHI OLEH :
IKLIM, ORGANISME, TOPOGRAFI,
TIPE PARENTAL, WAKTU
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PROFIL TANAH
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TEKSTUR TANAH
PROPORSI BERAGAM UKURAN
PARTIKEL TANAH
GRAVEL : LEBIH DARI 2 mm
SAND : 0,05 – 2 mm
SILT : 0,002 – 0,05
CLAY : KURANG DARI 0,002 mm
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TEKSTUR TANAH
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STRUKTUR TANAH
PARTIKEL TANAH PRIMER TERSUSUN MEMBENTUK UNIT SEKUNDER DISEBUT PEDS.
AGREGASI PEDS MEMBENTUK STRUKTUR TANAH
KLASIFIKASI STRUKTUR TANAH :
GRANULAR, PLATY, BLOCKY,
PRISMATIC.
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STRUKTUR TANAH
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KIMIA TANAH
PH TANAH : 4 – 8
TANAH SALIN : 7.3 – 8.5
KIMIA TANAH MENENTUKAN :
PENYERAPAN HARA
PEMBENTUKAN HUMUS
PERTUKARAN KATION
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TANAH HUTAN HUJAN
TROPIS
SANGAT DIPENGARUHI CUACA (IKLIM).
TANAH OXISOL : ASAM DAN MISKIN HARA
SERASAH TIPIS : MOBILISASI HARA SANGAT CEPAT PADA KONDISI PANAS DAN LEMBAB.
PRODUKTIVITAS TINGGI --- MISKIN HARA
DEFORESTRY MASALAH BESAR
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GANGGUAN PADA TANAH
INTEGRITAS TANAH TERLINDUNGI
OLEH VEGETASI
EROSI TANAH : LAPISAN ATAS
HILANG
PEMADATAN TANAH
HUJAN ASAM