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Determination of Plant Season Based on Oldeman Agri Climate Zone and Utilization of Regulation Food Crops Cropping Patterns in Kisar Island, Southwest Maluku Regency Laimeheriwa, Semuel; Madubun, Elia Leonard; Risamasu, Robby Gerald; Luhukay, Marcus
RUMPHIUS Vol 7 No 1 (2025): RUMPHIUS Pattimura Biological Journal
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/rumphiusv7i1p001-008

Oldeman agroclimate zone is a classification system used to group areas based on rainfall distribution patterns and soil moisture potential available throughout the year. This system provides a clearer picture of which areas are suitable for certain crops based on their water needs, as well as optimizing the use of existing climate resources through cropping patterns arrangements. This study aims to identify and analyze Oldeman agroclimate zones to determine the right planting season and develop efficient food crop cropping patterns on Kisar Island. This study combines two approaches, namely descriptive and quantitative with the following analysis stages: generating rainfall data, calculating average regional rainfall, determining agroclimate zones, determining planting seasons, and arranging cropping patterns. The results of the study indicate that Kisar Island is included in Agroclimate Zone E3 with a planting season length of 7 months, starting in December and ending in June. Intercropping or mixed cropping patterns are options in corn and legume cultivation. To avoid water shortages during the reproductive phase of the plant, dryland rice planting should be carried out in the period from March to June.

Study of Physical and Mineral Properties of Soil Clay Landslide Location of IAIN Campus Ambon City Luhukay , Marcus; Risamasu, Robby G.; Osok, Rafael M; Slamet, Sonya
International Journal of Multidisciplinary: Applied Business and Education Research Vol. 3 No. 12 (2022): International Journal of Multidisciplinary: Applied Business and Education Res
Publisher : Future Science / FSH-PH Publications

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/ijmaber.03.12.14

This study aims to determine physical and clay mineral properties of soils and how they affect the occurrence of erosion in the IAIN Campus Ambon. The results indicated that the two soil profiles shows a variety in soil properties. the largest distribution of soil particle density is 2.63 at soil layer P2L3 and the smallest is 2.26 at P1L1, the largest soil pore distribution is 60.12% at P2L1 and the smallest is 29.36% at P1L3, while the largest soil pores ratio distribution is 1.51% at P2L1 and the smallest is 0.42% at soil layer P1L3. The soil porosity reflects the level of the soil ability to pass water flow (permeability) or the speed of water flow to pass through the soil mass (percolation). By the decreasing of soil porosity and pore ratio in layers 3 and 4, the permeability is also slower. The major clay mineral found in both soil profiles is kaolinite, an unwell consolidated secondary clay mineral type 1:1 mixed with quartz, the most weathering resistant primary minerals. These two minerals have lower friction resistance due to the increasing of clay content in the lower soil profiles. The physical and hydrological soil properties as well as the presence of kaolinite and quartz in the lower soil layers are considered to be the cause of the erosion occurrence in the study area (IAIN campus).

Evaluation of Land Suitability for Clove (Eugenia Aromantica L) and Nut-meg (Myristica Fragrans Houtt) in Nusalaut Island Central Maluku Regency Kunu, Pieter J; Risamasu, Robby. G.; Ardiansa, Ardiansa; Laimeheriwa, Semuel
International Journal of Multidisciplinary: Applied Business and Education Research Vol. 4 No. 8 (2023): International Journal of Multidisciplinary: Applied Business and Education Rese
Publisher : Future Science / FSH-PH Publications

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/ijmaber.04.08.20

This research aimed to obtain land characters and qualities data and to determine land suitability for clove and nutmeg and their spatial distribution in Nusalaut Island, Central Maluku Regency. The results showed that the land suitability for clove are marginally suitable class (S3) with the coverage area is 1452.38 ha or 66.51%, and the limiting factors are water availability and nutrient retention (wa, nr) limiting factors and unsuitable class (N) of 731.52 ha or 33.50 %. While the land suitability for nutmeg are moderate suitable (S2) with root media and nutrient retention (rc, nr) limiting factors and the coverage area is 123.75 ha or 5.66%, S2nr of 409.93 ha or 18.77%, slope (S2eh) limiting factor with the coverage area is 918.7 ha or 42.1% and the unsuitable class (N) with the area of 731.52 ha or 33.50 %. The land suitability of the clove and nutmeg is located in the Other Used-Areas (APL) with the area of 2183.63 ha, while total land units in the study area is 2697 ha.

Classification of Soil Distribution on the Island of Saparua Based on the Soil Classification System National and the Equivalent to Soil Taxonomy Risamasu, Robby. G.
International Journal of Multidisciplinary: Applied Business and Education Research Vol. 4 No. 5 (2023): International Journal of Multidisciplinary: Applied Business and Education Rese
Publisher : Future Science / FSH-PH Publications

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/ijmaber.04.05.30

This research aims to classify the distribution of soils on Saparua Island, Central Maluku Regency, based on the Subardja, D, et al, (2016) and soil taxonomy (SSS, 2022). The benefit of this research is to find out the distribution of soils on Saparua Island to support the regional development plan. The method used is the survey method, with a semi-detailed survey level of a 1:50,000 scale. The pattern of the approach used is a physiographic analysis approach to landscapes, in which the research area is divided into terrestrial units based on the similarity of the properties of the variables that influence soil formation. The base map used in this study is a land unit map with a scale of 1:50,000. The results showed that the factors and processes involved in soil formation in the study area were parent material and topography, leaching, and eluviation processes. The soils found consisted of seven types of soil with 11 subgroups, namely: Regosol Eutric (Typic Udipsamments and Lithic Udipsamments), Litosol (Lithic Udorthents), Kambisol Distrik (Typic Dystrudepts), Kambisol Litik (Lithic Eutrudepts), Gleisol Eutrik (Typic Endoaquents and Aquic Eutrudepts), Gleisol Distrik (Typic Haplaquepts), Podsolik Kandik (Typic Hapludults and Typic Kandik), and Organosol Hemik (Hydric Tropohemists) were also found.

Analisis Perbandingan Indeks Kemiripan Tanah pada Topsekuens Granit Gunung Sirimau Kota Ambon Umanailo, Irmanji; Risamasu, Robby G; Puturuhu, Ferad; Luhukay, Marcus
JURNAL PERTANIAN KEPULAUAN Vol 9 No 2 (2025): Jurnal Pertanian Kepulauan
Publisher : Fakultas Pertanian, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/jpk.2025.9.2.106

This study aims to identify and describe soil morphological traits in the granite toposequence and analyze these traits to assess the similarity index between soil profiles. This study used a survey method involving transect observations and complete profile observations. Variable soil observations were made in a downward direction, following each change in slope segment on the granite toposequence. The results showed that Cambisol (Dystrudepts) soils developed with physical and chemical properties on three profiles for soil color ranging from yellowish brown to brownish yellow and yellowish red to red. The soil texture ranges from loamy sand to dusty clay, and the soil structure is rounded cubical. The soil has an acidic to slightly acidic pH and a slightly sticky consistency when moist and very low to low C-organic content. The similarity index assessed in the three profiles includes parameters such as dust/clay ratio, pH H₂O, and C-organic, which are very similar due to the similarity of the constituent rock formations.

Analisis Evaluasi Kesesuaian Lahan Beberapa Komoditas Pertanian Tanaman Pangan di Pulau Nusalaut Kabupaten Maluku Tengah Laimeheriwa, Semuel; G. Risamasu, Robby; Tomasoa, Reni; Jambormias, Edison
Jurnal Indonesia Sosial Sains Vol. 3 No. 11 (2022): Jurnal Indonesia Sosial Sains
Publisher : CV. Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jiss.v3i11.729

This research was conducted on Nusalaut Island, Central Maluku Regency, aiming to determine the land suitability class of several food crop commodities. Data collection and analysis methods include: (1) analysis of thematic maps, (2) preparation of Land Unit Maps (PSL), (3) field checking using the field survey method, which uses independent survey techniques; (4) observation of land characteristics and quality in each land unit, and (5) analysis of land characteristics and quality in each land unit. The follow-up analysis is in the form of: (1) determining the level of land suitability and (2) producing a map of land suitability classes for food crop commodities on the island of Nusalaut. The results of the assessment of land suitability class on food crops cassava, sweet potato, and corn included in the category of marginally suitable class (S3) with limiting factors of water availability (wa), rooting media (rc), slope (eh) and unsuitable class (N). Cassava plantations had a marginally suitable class (S3) with a limiting factor (wa, rc) of 1452.4 ha or 66.51% and for an unsuitable class (N) of 731.52 ha or 33.50%. Sweet potato plants have a marginally suitable class (S3) with a limiting factor (wa, rc, eh) covering an area of 1452.38 ha or 66.5% and for an unsuitable class (N) an area of 731.52 ha or 33.50%. Corn plants have a marginal suitable class (S3) with a limiting factor (wa, rc) covering an area of 1452.38 ha or 66.5% and for an unsuitable class (N) an area of 731.52 ha or 33.50%.

Chemical Quality of Drinking Water from Community Wells Adelina Siregar; Johannis P. Haumahu; Elizabeth Kaya; June Putinella; Robby G. Risamasu; Rudy Soplanit
Journal La Lifesci Vol. 7 No. 3 (2026): Journal La Lifesci
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallalifesci.v7i3.3291

Water is a primary necessity for human life, and its quality directly affects public health and community welfare. In Wayame Village, Ambon City, shallow wells are still used by the community as a source of water for daily needs, including drinking water. This study aimed to evaluate the chemical quality of shallow well water by comparing laboratory test results with the drinking water quality standards established by the Ministry of Health of the Republic of Indonesia. This study employed a descriptive quantitative method. A total of eight shallow well water samples were collected from community wells in Wayame Village using purposive sampling. The chemical parameters analyzed included pH, fluoride, total chromium, cadmium, nitrite, nitrate, iron, hardness, chloride, manganese, lead, and free chlorine. Laboratory analysis was conducted at the Provincial Health Laboratory of Maluku, and the results were compared with the Regulation of the Minister of Health of the Republic of Indonesia Number 492/Menkes/Per/IV/2010. The results showed that most chemical parameters were below the permissible limits for drinking water. Fluoride, total chromium, cadmium, nitrite, nitrate, iron, hardness, chloride, manganese, and lead were within the required standards. However, several samples showed pH values below the minimum standard, indicating slightly acidic water conditions. In addition, free chlorine levels in all samples were below the recommended range, indicating limited residual disinfection capacity.

Strategy for determining hotong (Setaria italica) planting time based on land water balance study on Yamdena Island, Maluku, Indonesia JEANNE I. NENDISSA; SEMUEL LAIMEHERIWA; ROBBY G. RISAMASU
Asian Journal of Agriculture Vol. 10 No. 1 (2026)
Publisher : Smujo International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/asianjagric/g100167

Abstract. Nendissa JI, Laimeheriwa S, Risamasu RG. 2026. Strategy for determining hotong (Setaria italica) planting time based on land water balance study on Yamdena Island, Maluku, Indonesia. Asian J Agric 10 (1): g100167. https://doi.org/10.13057/asianjagric/g100167. Food security in archipelagic regions still faces significant challenges due to limited food distribution, high dependence on seasonal rainfall, and low diversification of local food sources. One potential commodity that can support food independence in the region is hotong (Setaria italica), which is known to have high adaptability to marginal land conditions and limited agricultural inputs. However, hotong productivity on Yamdena Island, Maluku, Indonesia, is still relatively low, mainly due to the lack of determination of planting time that is in accordance with climate dynamics and soil water availability. This study aims to determine the optimal planting period for hotong through a land water balance analysis approach. The data used include rainfall for 30 years (1995-2024), other climate parameters for 15 years (2010-2024), and soil physical properties data, namely field capacity, permanent wilting point, and water holding capacity, plus crop coefficient values. The analysis was carried out by calculating 75% probability rainfall using the rank ordering method, estimating potential evapotranspiration using Cropwat 8.0 software, and integrating all parameters in a land water balance model based on the Thornthwaite and Mather method. Simulation results from 12 planting scenarios indicate that the planting period from December-March to March-June is the safest for hotong cultivation because soil water conditions remain optimal (≥112.5 mm) without deficits. April-July is still possible with small deficits, while May-November is high risk due to large deficits (90-380 mm) and drought during the critical phase. Statistical analysis using one-way ANOVA revealed significant differences in water deficit among planting scenarios (F=58.47, p<0.001), confirming that early rainy season planting significantly reduces water stress. Therefore, planting at the beginning of the rainy season is recommended to maintain productivity, while serving as a scientific basis for developing an adaptive planting calendar for local food development in archipelagic regions.

PEMANTAUAN KUALITAS AIR MINUM PADA SUMUR MASYARAKAT DI DESA WAYAME KOTA AMBON Putinella, June; Haumahu, Johannis P.; Kaya, Elizabeth; Siregar, Adelina; Risamasu, Robby G.; Soplanit, Rudy
Journal of Community Service Vol 8 No 1 (2026): JCS, June 2026
Publisher : Ikatan Dosen Menulis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56670/jcs.v8i1.414

Air merupakan kebutuhan primer dalam kehidupan ini. Ketersediaan air pada suatu wilayah baik dari segi kualitas maupun kuantitas sangat memengaruh bagi kehidupan. Pemanfaatan sumberdaya air secara tidak terkontrol dan seimbang antara ketersediaanya dengan kebutuhan akan mempengaruhi ketersediaanya. Air dan tanah merupakan sumber daya alam yang memiliki peranan penting dalam kehidupan. Ketersediaan air minum yang aman dan layak merupakan indikator penting dalam menentukan tingkat kesejahteraan dan kesehatan masyarakat. Namun demikian, tidak semua sumber air yang digunakan oleh masyarakat memenuhi standar kualitas yang ditetapkan, sehingga berpotensi menimbulkan berbagai permasalahan kesehatan. Penelitian ini bertujuan untuk mengetahui kandungan sifat fisik, kimia dan mikrobiologi dalam air sumur dangkal yang digunakan oleh masyarakat. Analisis laboratorim dilaksanakan pada Laboratorium Kesahatan Propinsi Maluku. Berdadsarkan pada hasil analisis laboratorium menunjukkan bahwa kandungan fisik dan kimia berada dibawah standart baku mutu air minum yang dikeluarkan oleh Kementerian Kesehatan RI, sedangkan mikro biologi berada di atas standat yang ditetapkan.

Chemical Quality of Drinking Water from Community Wells Adelina Siregar; Johannis P. Haumahu; Elizabeth Kaya; June Putinella; Robby G. Risamasu; Rudy Soplanit
Journal La Lifesci Vol. 7 No. 3 (2026): Journal La Lifesci
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar

Water is a primary necessity for human life, and its quality directly affects public health and community welfare. In Wayame Village, Ambon City, shallow wells are still used by the community as a source of water for daily needs, including drinking water. This study aimed to evaluate the chemical quality of shallow well water by comparing laboratory test results with the drinking water quality standards established by the Ministry of Health of the Republic of Indonesia. This study employed a descriptive quantitative method. A total of eight shallow well water samples were collected from community wells in Wayame Village using purposive sampling. The chemical parameters analyzed included pH, fluoride, total chromium, cadmium, nitrite, nitrate, iron, hardness, chloride, manganese, lead, and free chlorine. Laboratory analysis was conducted at the Provincial Health Laboratory of Maluku, and the results were compared with the Regulation of the Minister of Health of the Republic of Indonesia Number 492/Menkes/Per/IV/2010. The results showed that most chemical parameters were below the permissible limits for drinking water. Fluoride, total chromium, cadmium, nitrite, nitrate, iron, hardness, chloride, manganese, and lead were within the required standards. However, several samples showed pH values below the minimum standard, indicating slightly acidic water conditions. In addition, free chlorine levels in all samples were below the recommended range, indicating limited residual disinfection capacity.

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