Karakteristik Tanah - Tanah di Katena Arah Tenggara Gunung Poco Sessok di Manggarai Barat, Nusa Tenggara Timur

MEGA TRIANGGUN REIWUTY, Dr.Agr.Makruf Nurudin, S. P., M. P.; Dr. Agr. Cahyo Wulandari, S.P., M.P

2018 | Skripsi | S1 ILMU TANAH

Penelitian ini dilakukan dengan tujuan mengetahui perbedaan jenis tanah di sisi bagian tenggara Gunung Poco Sessok, Kabupaten Manggarai Barat, Nusa Tenggara Timur. Penentuan titik sampel mewakili ketinggian tempat, terdapat 6 titik yang ditentukan mewakili 6 lokasi dengan ketinggian berbeda. Analisis sampel meliputi analisis sifat fisika tanah dan kimia tanah yang dilaksanakan di laboratorium. Parameter fisika tanah yaitu tekstur, berat volume, berat jenis, porositas, konsistensi, struktur, warna, dan kadar lengas tanah. Sementara sifat kimia tanah yaitu kapasitas pertukaran kation, bahan organik, C-organik, daya hantar listrik, nitrogen total,fosfor tersedia dan kejenuhan basa. Hasil penelitian menunjukan bahwa tanah-tanah di sisi tenggara Gunung Poco Sessok merupakan tanah muda dan berkembang lanjut. Hal ini ditunjukan dengan keberadaan solum tanah yang dangkal yakni 80 cm - 90 cm dan lapisan bawah merupakan batuan. Jenis batuan induk di wilayah bagian tenggara Gunung Poco Sessok adalah Hornblende Andesite, Calcareous Feldsphatic Arenite, Pyroxene Andesite. Klasifikasi tanah PPT Bogor pada Stopsite 1 adalah Alluvial Dystric, Stopite 2 Kambisol Dystric, Stopsite 3 Alluvial Dystric, Stopsite 4 Mollisol Cromic, Stopsite 5 Regosol Eutric dan Stopsite 6 Mollisol Oksik. Klasifikasi sesuai FAO pada Stopsite 1 adalah Regosol Colluvial (Dystric, Epiclayic,Thepric), Stopsite 2 Haplic Cambisol ( Dystric, Epiclayic), Stopsite 3 Regosol Colluvial (Cromik, Clayic), Stopsite 4 Luvic Chernozems (Pachik), Stopsite 5 Regosol Colluvial (Rhodic, Eutric, Chromics) , Stopsite 6 Vertic Luvisol ( Clayic, Greyic). Klasifikasi USDA pada Stopsite 1 adalah Typic Udorthents netral isohypertermik, Stopsite 2 Lithic Humudepts netral isohypertermik, Stopsite 3 Typic Udorthents netral isohypertermik, Stopsite 4 Lithic Haprendolls netral isohypertermik, Stopsite 5 Typic Udorthents netral isohypertermik dan Stopsite 6 Lythic Argiudolls netral isohypertermik.

This study was conducted with the aim of knowing the different types of soil on the southeastern side of Mount Poco Sessok, West Manggarai Regency. Sample point determination represents the height of the place. Each one sample point represents the height on the mountain. Sample analysis includes analysis of soil physical and chemical properties of soil implemented in laboratory. Soil physics parameters are texture, volume weight, specific gravity, porosity, consistency, structure, color, and moisture content. While the soil chemical properties are cation exchange capacity, organic material, C-organic, electrical conductivity, total nitrogen, Phospor is available, and ground saturation on the ground. The results showed that the land on the southeast side of Mount Poco Sessok is a young and growing land. This is indicated by the presence of a shallow soil solum that is 80 cm - 90 cm and the bottom layer is a rock. The main rock types in the southeastern region of Mount Poco Sessok are Hornblende Andesite, Calcareous Feldsphatic Arenite, Pyroxene Andesite. Soil Classification of PPT Bogor on 1 is Alluvial Dystric, Stopite 2 Kambisol Dystric, Stopsite 3 Alluvial Dystric, Stopsite 4 Mollisol Cromic, Stopsite 5 Regosol Eutric and Stopsite 6 Mollisol Oksik. FAO classification on Stopsite 1 is Regosol Colluvial (Dystric, Epiclayic, Thepric), Stopsite 2 Haplic Cambisol (Dystric, Epiclayic), Stopsite 3 Regocol Colluvial (Cromik, Clayic), Stopsite 4 Luvic Chernozems (Pachik), Stopsite 5 Regosol Colluvial (Rhodic, Eutric, Chromics), Stopsite 6 Vertic Luvisol (Clayic, Greyic). The USDA classification on Stopsite 1 is Typic Udorthents neutral isohypertermik, Stopsite 2 Lithic Humudepts neutral isohypertermik, Stopsite 3 Typic Udorthents neutral isohypertermik, Stopsite 4 Lithic Haprendolls neutral isohypertermik, Stopsite 5 Typic Udorthents neutral isohypertermik and Stopsite 6 Lythic Argiudolls neutral isohypertermik.

Kata Kunci : Gunung Poco Sessok , batuan induk , faktor pembentuk tanah , katena , fisika dan kimia tanah.