ptt 101, the science of soils -...
TRANSCRIPT
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I. PENDAHULUAN
Reading Materials:
•N.C. Brady and R.R Weil, 2002. The Nature and Properties of Soils
•Goeswono Supardi, 1989. Sifat dan Ciri Tanah
The Science of Soils
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Danny Dwi Saputra, SP. MSi
(DDS)
Dr. Ir. Sugeng Prijono, MS
(SPJ)
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Topik Pembahasan Ilmu Tanah
Bab Topik
1 Pendahuluan : Pengertian Tanah
2 Tanah sebagai Media Tumbuh
3 Proses Pembentukan Tanah
4 Mineralogi Tanah
5 Morfologi Tanah
6 Fisika Tanah
7 Bahan organik Tanah
8 Biologi Tanah
9 Kimia Tanah
10 Klasifikasi Tanah
11 Pengelolaan Tanah
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Pelaksanaan
Kuliah (bobot 70%)
Praktikum (bobot 30%)
Evaluasi
Kuliah Quis, Tugas tersturktur, UTS, UAS
Praktikum Laporan praktikum, Ujian Praktikum
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Sistem Kredit Semester: SKS
Suatu sistem penyelenggaraan pendidikan dimana:
• beban studi MAHASISWA,
• beban kerja DOSEN, dan
• beban PENYELENGGARAAN PROGRAM LEMBAGA
dinyatakan dalam satuan kredit semester (SKS)
= Beban Kegiatan per minggu selama satu semester (14-16
minggu)
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50 menit kuliah
60 menit acara kegiatan
akademik terstruktur (PR)
60 menit acara kegiatan
mandiri (misalnya baca
referensi)
50 menit kuliah
60 menit perencanaan &
evaluasi kegiatan akademik
terstruktur
60 menit pengembangan
materi kuliah
Mahasiswa Dosen
1 SKS
• Kegiatan tersebut dilakukan secara teratur setiap minggu
selama satu semester (14 -16 minggu)
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3 SKS
2 SKS kuliah
100 menit kuliah
120 menit persiapan dan tugas-tugas
terstruktur
120 menit kegiatan mandiri
(persiapan/pengulangan)
1 SKS Praktikum/tugas
terstruktur
100 menit Praktek Laboratorium atau
Lapangan
120 menit membuat laporan dan
mengerjakan tugas & pustaka
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Penilaian dan Absensi
Penilaian: Praktikum, Laporan/Ujian : 30%
Tugas Terstruktur/Mandiri : 20%
Ujian (tulis) : 50%
Bila ada salah satu nilai yang kosong Nilai K & harus diurus max 1 minggu bila tidak nilai berubah menjadi E
Bila kehadiran kuliah <80 % TIDAK BOLEH Mengikuti ujian
Ketentuan dan Aturan harus dipahami secara benar, jangan percaya dengan KATANYA
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Rambu-rambu pertemuan kelas
Mahasiswa terlambat lebih dari 15 menit tidak diperbolehkan masuk dalam kelas
Semua alat komunikasi harap dimatikan selama perkuliahan (minimal di silent)
Keterlambatan pengumpulan tugas nilai maksimal 65, tidak mengumpulkan tugas nilai nol (0)
Pengumpulan tugas dikoordinir oleh ketua kelas, pengumpulan selain oleh ketua kelas TIDAK AKAN DITERIMA
Ketentuan dan Aturan harus dipahami secara benar, jangan percaya dengan KATANYA
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Objectives • To learn the appropriate use of the
terms “soil” and “dirt”
• To understand the components of
soils
• To understand the concept of soil and
its importance to organisms and to the
welfare of society.
• To gain knowledge about the
relationship of soil and healthy
environment.
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It is embarrassing not to be able to
agree on what soil is. In this the
pedologists are not alone. Biologists
cannot agree on a definition of life
and philosophers on philosophy.
Hans Jenny, The Soil Resource:
Origin and Behavior
What is a SOIL?
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The difference between “Soil” and “Dirt”?
Farmer:
• Soil is more than
useful ~ The
farmer earns a
living from the soil
• Dirt is soil out of
place
© Foto: Kurniatun Hairiah, 2002
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Habitat of soil
organism Pot materials
System for water supply &
purification
© Foto: Kurniatun Hairiah, 2002
Medium of plant
growth
Soil…Its not a dirty word, but its worth !
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Litter (Seresah):
• Dead leaf (Daun gugur )
• Twigs (tangkai daun + ranting)
• Branches (cabang)
Soil Function: Nutrient Cycling
Litter
Plant
Roots
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GOLD MINING COAL MINING
Soil is dirt, it should be removed!
Road construction
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Pedological or Edaphological or Both?
Pedology :
• The study of Soil as a natural body and does
not focus on the soil’s immediate practical use.
• It examnies and classifies soil as they occur
in their natural environment. Construction
engineers, highway etc
Edaphology:
• The study of Soil from the standpoint of
higher plants. plant production!
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Unconsolidated
materials overlying
rocks Regolith
Part of regolith
which weathered
biochemically
Soil
What is SOIL?
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• Tubuh alam yang
dinamis.
• Terbentuk karena
adanya proses alam
(fisik, kimia dan
biologi).
• Dipengaruhi oleh iklim,
topografi, bahan induk
tanah, waktu.
TANAH
© Foto: Meine van Noordwijk, 2002
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• Soil is a living entity that is continually undergoing
development
• Dirt is stagnant remnants of organic and mineral
matter
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Soil is alive!
Ekologi Tanah, gabungan:
• Ekologi (orientasi organisma)
• Ilmu Tanah: klasifikasi, genesis, fisika, kimia, biologi
Overlap ke dua ilmu
TANAH :
a. Bahan anorganik (liat, debu, pasir)
b. Bahan organik tanah
• Hidup (biomas)
• Mati (nekromas)
c. Air
d. Udara
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SOIL COMPONENTS
Mineral
45%
Air 25 %
Water
25 %
organic
5%
For optimum plant growth
Representative, medium-textured surface soil (by volume)
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Consequences of Misuse:
© Foto: Kurniatun Hairiah, 2002
Horticulture on steep slope (West Lampung, 2002)
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Hutan
Jagung
Alih-guna Hutan menjadi lahan
pertanian (monokultur)
Akar pohon
mati akibat
penebangan
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Consequences of Misuse:
(Nantu-Gorontalo, Photo: M van Noordwijk)
Tebing sungai yang terbuka…rawan terkikis
air dan Longsor konsentrasi sedimen
meningkat!
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Consequences of Misuse:
Penambangan pasir di
dasar sungai memicu
terjadinya Longsor tebing
sungai !
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Consequences of Misuse:
(Photo: G. Cadisch)
Luas lahan terbuka (untuk
pertanian) meningkat
erosi air sungai keruh