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All Journal COCOS Jurnal Pendidikan IPA Indonesia
Jooudie N. Luntungan
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Agriculture, Biological Sciences & Forestry Education

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Kesesuaian Lahan Tanaman Kedelai di Sebagian Wilayah Desa Sea dan Warembungan Kecamatan Pineleng Menggunakan Sistem Informasi Geografis Jesika Naumi Naibaho; Jooudie N. Luntungan; Maria Montolalu
COCOS Vol. 10 No. 5 (2018)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i3.24357

Abstract

Abstrak  Penelitian ini bertujuan untuk mengetahui kelas kesesuaian lahan tanaman kedelai di sebagian wilayah Desa Sea dan Warembungan, Kecamanatan Pineleng. Penelitian ini dapat memberikan informasi kepada pemerintah dan  masyarakat Desa Sea dan Warembungan Kecamatan Pineleng Sulawesi Utara tentang kelas kesesuaian lahan  untuk tanaman kedelai beserta factor-faktor pembatas dalam pengelolaan tanaman ini. Penelitian ini dilaksanakan selama 6 (enam) bulan, terhitung sejak bulan Februari sampai Agustus 2018, dengan menggunakan metode survei melalui pendekatan unit lahan. Dalam penelitian ini, satuan lahan diperoleh dari hasil tumpang susun antara data penggunaan lahan, data kemiringan lereng. Data karakteristik lahan diperoleh dari pengamatan lapang dan hasil analisis sampel di laboratorium.  Teknik pengumpulan data berupa  observasi/pengamatan tanah di lapang dan analisis laboratorium. Teknik analisis data untuk mengetahui kelas kesesuaian lahan menggunakan sistem informasi geografis, yaitu dengan perangkat lunak ArcGIS 10.3 sehingga didapatkan peta kesesuaian lahan tanaman kedelai di sebagian wilayah Desa Sea dan Warembungan Kecamatan Pineleng. Hasil penelitian menunjukkan bahwa lokasi penelitian dengan luas 584,61 Ha yang merupakan sebagian Wilayah Desa Sea dan Warembungan  Kecamatan Pineleng memiliki enam unit lahan. Unit-unit lahan ini mempunyai potensi untuk pengembangan tanaman kedelai. Secara aktual lokasi ini memiliki kelas kesesuaian  N (Tidak Sesuai) dengan faktor pembatas curah hujan, bahaya erosi dan kedalaman efektif. Namun, secara potensial lokasi ini memiliki kelas kesesuaian lahan S3 (Sesuai Marginal) apabila dilakukan  usaha-usaha perbaikan seperti saluran drainase, pembuatan teras dan penanaman tanaman penutup lahan.  Kata Kunci : Kesesuaian Lahan, Kedelai, Sistem informasi Geografis
KEHILANGAN TANAH SAAT PANEN PADA TANAMAN BAWANG DAUN (Allium fistulosum L) Nehemia Angeli Mukuan; Yani E. B. Kamagi; Jooudie N. Luntungan
COCOS Vol. 12 No. 4 (2020): EDISI OKTOBER-DESEMBER 2020
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i1.31906

Abstract

ABSTARCT The purpose of this study was to determine the amount of soil transported or involved in the roots and stems of leeks at harvest time. This research was conducted to determine the amount of soil involved when the leek plants were harvested in the agricultural land of Rurukan, East Tomohon sub-district. This plant is a potential commodity and important for the local community because it supports the economy of the farming community. This research uses descriptive research methods (Anonymous, 1984). The variables observed were root weight (Xa) and leek stem diameter (Xb) to the amount of soil transported (Yt) with a total of 40 samples with the multiple linear regression analysis method at the 5% level (Sugiarto, 1992). The results showed that the amount of soil transported on one leeks plants was 4.1064 gr with an estimated value based on multiole regression equation, namely: Yt = 0.3253 + 3.2661Xa + 0.5150Xb, at R2 = 0.6292. Key words: Loss of Soil, Leek
Spatial Impact of Nitrogen Fertilizer Residue on the Biotic Environment of Rice Field Irrigation Channels Wantasen, Sofia; Jooudie N. Luntungan; Roni Koneri; Selvie Tumbelaka; Jacqueline Joseph; Junivia Virginia Jermias
Jurnal Pendidikan IPA Indonesia Vol. 14 No. 2 (2025): June 2025
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v14i2.22577

Abstract

This study aims to analyze the spatial distribution of the impact of nitrogen residue/diversification on the diversity of aquatic biota and contribute to the management of aquatic ecosystems as a source of life. Water quality sampling was carried out by grab sampling with water quality parameters measured including total nitrogen (TN), ammonia (NH₃), nitrate (NO₃⁻), and nitrite (NO₂⁻). TN analysis was carried out using the Total Kjeldahl Nitrogen (TKN), nitrate, and nitrite calculation methods. NH₃ was measured using the Flow Injection Analysis method, while NO₃⁻ was analyzed using the Cadmium Reduction Method and NO₂⁻ with the colorimetric method.Plankton sampling was done by filtering 20 liters of water from the surface layer using a 2-liter bucket. The plankton species diversity index was calculated using the Shannon-Wiener Index method. The effect of environmental factors on nitrogen chemical fertilizer residues in each research location was analyzed using the Principal Component Analysis (PCA). The results showed an increase in ammonia and nitrite residues followed by a decrease in total nitrogen and nitrate concentrations. Seven classes and 22 plankton species were identified, consisting of 18 phytoplankton species and four zooplankton species. The dominant plankton came from Cyanophyceae, Bacillariophyceae, and Chlorophyceae. The highest plankton species diversity index was recorded in Irrigation IX and VII. Based on the study results, plankton diversity at the research location is included in the moderate category. The main environmental factors that influence the presence of plankton in irrigation channels are the concentration of nitrate and nitrogen in the water.
Co-Authors Jacqueline Joseph Jesika Naumi Naibaho Junivia Virginia Jermias Maria Montolalu Nehemia Angeli Mukuan Roni Koneri Selvie Tumbelaka Sofia Wantasen Yani E. B. Kamagi