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KATA PENGANTAR
Pertama-tama penulis mengucapkan puji syukur kehadirat Allah Swt karena berkat
rahmad dan karunianyalah makalah yang berjudul “ Air dan Pengaruhnya Terhadap
Tumbuhan” ini dapat penulis selesaikan. Shalawat beriring salam penulis sampaikan
kepada nabi Muhammad Saw yang telah membawa umatnya dari zaman kebodohan
menuju zaman yang penuh dengan ilmu pengetahuan seperti sekarang ini.
Dalam kesempatan ini penulis juga ingin mengucapkan terimakasih kepada Dr.
Elfis, M. Si sebagai dosen pembimbing, dan teman-teman yang telah memberikan saran
dan masukan serta senantiasa memberikan motivasi dan dorongan sehingga
terselesaikannya makalah ini.
Penulis menyadari bahwa apa yang disajikan dalam makalah ini masih banyak
terdapat kekurangan, baik menyangkut isi maupun penulisannya, kekurangan itu
terutama disebabkan kelemahan dan keterbatasan pengetahuan serta kemampuan
penulis sendiri. Hanya dengan kearifan dan bantuan dari berbagai pihak untuk
memberikan teguran, kritik yang konstruktif dan saran, kekurangan-kekurangan tersebut
dapat diperbaiki sehingga dapat memberikan manfaat yang maksimal.
Akhirnya demikian yang dapat penulis berikan, mudah-mudahan makalah ini
dapat memberikan manfaat dan diridhoi Allah Swt. Amin
Pekanbaru, April 2011
Penulis
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DAFTAR PUSTAKA
KATA PENGANTAR...................................................................................................i
DAFTAR ISI..................................................................................................................ii
BAB I PENDAHULUAN...........................................................................................1
1 Pendahuluan.....................................................................................................1
BAB II PEMBAHASAN.............................................................................................2
1 Tanah, Bahan dan Pembentukan Tanah...........................................................2
1.1 Pengertian Tanah.......................................................................................2
1.2 Bahan dan Pembentukan Tanah................................................................. 2
2 Profil Tanah....................................................................................................21
3 Tanah Sebagai Medium..................................................................................24
4 Fisika Tanah....................................................................................................25
4.1 Warna Tanah..............................................................................................25
4.2 Tekstur Tanah............................................................................................27
4.3 Srtuktur Tanah...........................................................................................29
4.4 Konsistensi Tanah......................................................................................31
4.5 Bobot Tanah...............................................................................................34
4.6 Aerasi Tanah..............................................................................................34
5 Kimia Tanah.....................................................................................................35
5.1 Koloid Organik..........................................................................................35
5.2 Derajat Kemasaman Tanah (pH)...............................................................36
5.3 Kapasitas Tukar Kation..............................................................................37
5.4 Unsur Hara Dalam Tanah (Makro dan Mikro)..........................................38
6 Organisme di dalam Tanah..............................................................................40
6.1 Penggolongan Mikroba Tanah...................................................................40
6.2 Protozoa.....................................................................................................41
6.3 Cendawan Tanah........................................................................................42
6.4 Ganggang...................................................................................................42
6.5 Cacing Tabah.............................................................................................43
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6.6 Artropoda...................................................................................................43
7 Adaptasi Tumbuhan Terhadap Jenis Tanah.....................................................44
BAB III PENUTUP.......................................................................................................46
1 Kesimpulan........................................................................................................46
DAFTAR PUSTAKA....................................................................................................47
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