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All Journal Jurnal Ilmu Pertanian jurnal Ilmu Pertanian (Agricultural Science) Action Research Literate (ARL) AGRI-SOSIOEKONOMI
Kumolontang, Geyby .,
Program Studi Agroteknologi Universitas Kristen Indonesia Tomohon
Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences

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JENIS-JENIS SERANGGA YANG BERASOSIASI PADA ECENG GONDOK DI DANAU TONDANO Geyby ., Kumolontang; Max ., Tulung; Christina L. Salaki
AGRI-SOSIOEKONOMI Vol. 13 No. 3A (2017)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (504 KB) | DOI: 10.35791/agrsosek.13.3A.2017.18059

Abstract

This study aims to see the abundance of species and populations of insects found in water hyacinth vegetation in Tondano Lake.  This research was conducted at Entomology and Phytopathology Laboratory of Agriculture Faculty at Sam Ratulangi University in Manado and on the coast of Tondano Lake. This study was conducted for 3 months. The research method used purposive sampling method or intentional intake at 5 point location of hyacinth vegetation in Tondano Lake. Determination of Research Location is based on the amount of area that has been covered by water hyacinth on the coast of Tondano. On each location has been determined and then made a plot of sampling area of 10 x 10 m. The results showed that the types of insects found in the hyacinth vegetation in Tondano Lake were from family: Culicidae, Muscidae, Phoridae, Sepsidae, Drosopilidae, Apdididae, Anthomyidae, Carabidae, Dolichopodidae, Braconidae, Stratiomiidae, Ichneumonidae, Cecidomidae, Bombylidae and Sphingidae. Insect populations fluctuate in each observation. The existence of insects found in hyacinth vegetation in Tondano Lake is generally caused by the close distance between water hyacinth with rice fields and plantations and the existence of decaying vegetation that can be a good habitat for these breeding insects, in addition there are also enemies naturally found due to its activities in the search for prey. 
Pengaruh Pupuk Kandang Ayam Terhadap Tanaman Kacang Buncis (Phaseolus Vulgaris) Kumolontang, Geyby
Action Research Literate Vol. 8 No. 9 (2024): Action Research Literate
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/arl.v8i9.1554

Abstract

Penelitian ini bertujuan untuk melihat pengaruh dosis pupuk kandang ayam terhadap pertumbuhan dan produksi kacang buncis. Penelitian ini dilaksanakan di Kelurahan Talete Kecamatan Tomohon Tengah Kota Tomohon dengan waktu 4 bulan terhitung masa persiapan sampai penyusunan laporan. Metode percobaan yang digunakan adalah factor tunggal dalam Rancangan Acak lengkap (RAL) yang terdiri dari 5 perlakuan dosis pupuk kandang ayam, yaitu : Perlakuan A (tanpa pemupukan), B (pupuk kandang ayam 250 gram), C (pupuk kandang ayam 500 gram), D (pupuk kandang ayam 750 gram) dan E (pupuk kandang ayam 1000 gram). Masing masing perlakuan diulang sebanyak 3 (tiga) kali sehingga diperoleh 15 unit percobaan. Dalam penelitian ini dilakukan pengamatan terhadap tinggi tanaman, jumlah bunga, jumlah buah dan berat basah polong. Hasil penelitian menunjukkan bahwa perlakuan pemupukan pupuk kandang ayam berpengaruh sangat nyata terhadap pertumbuhan dan produksi kacang buncis. Penggunaan pupuk kandang ayam dengan dosis 250 gram sampai 500 gram memberikan rata rata hasil terbaik untuk produksi kacang buncis.
Comparative Analysis of Chicken Manure and NPK Fertilizer on Profitability and Environmental Impact in Food Crop Farming in Tomohon Rumondor, Fadly Steven Jefry; Kumolontang, Geyby; Lintong, Heibert
Jurnal Ilmu Pertanian Vol 11, No 1 (2026): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.113909

Abstract

Chicken manure improves soil fertility by adding organic matter and enhancing soil structure, while NPK fertilizer provides fast, readily available nutrients. This study compared both fertilization strategies in rice and corn farming in Tomohon City, focusing on profitability, production costs, environmental impacts, and factors influencing farmers’ choices. A comparative observational method was used with 120 farmers selected through simple random sampling. Results showed that NPK fertilizer generated higher profits in corn farming, but no significant difference was found in rice. Meanwhile, chicken manure resulted in more cost-efficient production. Environmentally, chicken manure improved soil quality by increasing pH toward neutral, raising organic carbon (>2.7%), enhancing cation exchange capacity, and reducing nitrate residues and exchangeable aluminum—key indicators of long-term soil health in volcanic soils. In contrast, NPK fertilizer contributed to soil degradation, including declining pH, reduced organic matter, and accumulation of nitrate and exchangeable aluminum, which may harm root development and increase groundwater contamination risks. Farmers’ fertilizer choices are influenced by technical, economic, institutional, and socio-cultural factors. Overall, the findings highlight the importance of integrated fertilization strategies combining organic and inorganic inputs to balance short-term profitability and long-term sustainability. Policy efforts should focus on promoting integrated nutrient management, strengthening extension services, and providing incentives for environmentally sustainable practices to improve farm outcomes while preserving soil health.
Comparative Analysis of Chicken Manure and NPK Fertilizer on Profitability and Environmental Impact in Food Crop Farming in Tomohon Rumondor, Fadly Steven Jefry; Kumolontang, Geyby; Lintong, Heibert
Jurnal Ilmu Pertanian Vol 11, No 1 (2026): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.113909

Abstract

Chicken manure improves soil fertility by adding organic matter and enhancing soil structure, while NPK fertilizer provides fast, readily available nutrients. This study compared both fertilization strategies in rice and corn farming in Tomohon City, focusing on profitability, production costs, environmental impacts, and factors influencing farmers’ choices. A comparative observational method was used with 120 farmers selected through simple random sampling. Results showed that NPK fertilizer generated higher profits in corn farming, but no significant difference was found in rice. Meanwhile, chicken manure resulted in more cost-efficient production. Environmentally, chicken manure improved soil quality by increasing pH toward neutral, raising organic carbon (>2.7%), enhancing cation exchange capacity, and reducing nitrate residues and exchangeable aluminum—key indicators of long-term soil health in volcanic soils. In contrast, NPK fertilizer contributed to soil degradation, including declining pH, reduced organic matter, and accumulation of nitrate and exchangeable aluminum, which may harm root development and increase groundwater contamination risks. Farmers’ fertilizer choices are influenced by technical, economic, institutional, and socio-cultural factors. Overall, the findings highlight the importance of integrated fertilization strategies combining organic and inorganic inputs to balance short-term profitability and long-term sustainability. Policy efforts should focus on promoting integrated nutrient management, strengthening extension services, and providing incentives for environmentally sustainable practices to improve farm outcomes while preserving soil health.
Co-Authors Christina Salaki Fadly Steven Jefry Rumondor Lintong, Heibert Max ., Tulung Tulung, Max .,