PANDRE LISTIAN, NPM 2203100106 (2026) DAMPAK SIFAT FISIK TANAH PADA AREAL REFLANTING TANAMAN KARET YANG AKAN DIKONVERSI KE TANAMAN KELAPA SAWIT DI DESA JANJI, KABUPATEN LABUHANBATU. Skripsi thesis, Universitas Labuhanbatu.
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Abstract
Konversi lahan dari kebun karet menuju kelapa sawit merupakan praktik umum di Sumatera Utara untuk meningkatkan keuntungan ekonomi. Namun, perubahan ini berpotensi menyebabkan degradasi sifat fisika tanah yang kritis bagi keberlanjutan produksi. Penelitian ini bertujuan untuk menganalisis kondisi sifat fisika tanah pada areal replanting karet yang akan dikonversi di Desa Janji, Kabupaten Labuhanbatu, sebagai dasar evaluasi kesesuaian lahan dan penyusunan rekomendasi pengelolaan. Pengambilan sampel tanah dilakukan secara purposive sampling pada kedalaman 0-20 cm dan 20-40 cm di tiga block percontohan. Parameter yang diukur meliputi bulk density (BD), total ruang pori (TRP), kadar air, permeabilitas, dan stabilitas agregat. Hasil penelitian menunjukkan bahwa secara umum kondisi sifat fisika tanah telah mengalami penurunan. Nilai BD berkisar antara 1.42-1.58 g cm⁻³ (kategori padat), TRP 40.3-46.4% (kategori sedang-rendah), dan permeabilitas 2.1-4.5 cm jam⁻¹ (kategori agak lambat hingga agak cepat). Kadar air tersedia tergolong rendah. Hasil ini mengindikasikan bahwa lahan telah mengalami pemadatan dan penurunan kualitas pori akibat aktivitas mesin dan pengelolaan sebelumnya. Oleh karena itu, konversi ke kelapa sawit harus didahului dengan penerapan praktik konservasi tanah, seperti penambahan bahan organik, penggunaan tanaman penutup tanah (cover crop), dan pengelolaan lalu lintas mesin (controlled traffic) untuk memulihkan kesehatan tanah dan menjamin produktivitas berkelanjutan. Kata Kunci : Sifat Fisika Tanah ; Konversi Lahan ; Replanting Karet ; Kelapa Sawit ; Bulk Density ; Kesesuaian Lahan =================================================================================== Land conversion from rubber plantations to oil palm plantations is a common practice in North Sumatra to increase economic profits. However, this change has the potential to cause degradation of soil physical properties that are critical to sustainable production. This study aims to analyze the condition of soil physical properties in a rubber replanting area to be converted in Janji Village, Labuhanbatu Regency, as a basis for evaluating land suitability and developing management recommendations. Soil sampling was conducted using purposive sampling at depths of 0-20 cm and 20-40 cm in three pilot blocks. Parameters measured included bulk density (BD), total pore space (TRP), water content, permeability, and aggregate stability. The results showed that in general the condition of soil physical properties has decreased. BD values ranged from 1.42-1.58 g cm⁻³ (dense category), TRP 40.3-46.4% (medium-low category), and permeability 2.1-4.5 cm h⁻¹ (moderately slow to moderately fast category). Available water content was relatively low. These results indicate that the land has experienced compaction and decreased pore quality due to previous machinery and management activities. Therefore, conversion to oil palm must be preceded by the implementation of soil conservation practices, such as the addition of organic matter, the use of cover crops, and controlled machine traffic management to restore soil health and ensure sustainable productivity. Keywords: Soil Physical Properties; Land Conversion; Rubber Replanting; Oil Palm; Bulk Density; Land Suitability
| Item Type: | Thesis (Skripsi) |
|---|---|
| Uncontrolled Keywords: | Sifat Fisika Tanah ; Konversi Lahan ; Replanting Karet ; Kelapa Sawit ; Bulk Density ; Kesesuaian Lahan=================Soil Physical Properties; Land Conversion; Rubber Replanting; Oil Palm; Bulk Density; Land Suitability |
| Subjects: | Q Science > QK Botany S Agriculture > S Agriculture (General) S Agriculture > SB Plant culture |
| Divisions: | Fakultas Sains Dan Teknologi > Agroteknologi |
| Depositing User: | Unnamed user with email repository@ulb.ac.id |
| Date Deposited: | 26 May 2026 03:36 |
| Last Modified: | 26 May 2026 03:36 |
| URI: | http://repository.ulb.ac.id/id/eprint/2420 |
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