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Fertilization is one of the efforts made to add nutrients in the soil and can increase plant growth and yield. Currently, organic fertilizers based on local resources have been developed considering the negative impact of excessive inorganic use. The use of fertilizers made from local resources in Merauke Regency is important to develop and study its potential. The purpose of this study was to analyze the potential combination of organic fertilizer content based on sago dregs. The study lasted for 1 month with organic fertilizer fermentation carried out at the Agrotechnology Laboratory, Faculty of Agriculture, Musamus University and the nutrient levels of organic fertilizers in the form of nitrogen, phosphorus, potassium, iron, zinc, pH, and water content were analyzed at the Biotrope Laboratory. The treatment in this study consisted of various organic materials in Merauke Regency with the main ingredients of sago dregs, namely lamtoro leaves + pig manure (P1), sago dregs + pig manure (P2), sago dregs + lamtoro leaves (P3), sago dregs + lamtoro leaves. + pig dung (P4), sago dregs + chicken manure (P5) and sago dregs + cow dung (P6). The treatment used a ratio of 2:1 (v/v) on each composition of the treatment material. The results of the analysis show that the nutrient content of organic fertilizer based on sago dregs varies depending on the composition of the material and has the potential to be used to increase crop production. The highest nitrogen, C/N and C-Organic levels were obtained in the treatment of sago dregs + pig manure, the highest phosphorus content was obtained in the treatment of sago dregs + chicken and the highest potassium was found in the composition of lamtoro leaf compost + pig manure.

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Turmeric rhizome (Curcuma longa) and lemongrass (Cymbopongon nardus) is a spice plants that are used as ingredients for making traditional medicines and have high population. The research aimed to toxicity test of turmeric rhizome and lemongrass extracts as botanical insecticide against Spodoptera exiqua mortality. Tested using four concentrations and three times repeats. The concentration for extracts same is 25 gram/ 500 ml in water, 50 gram/ 500 ml in water, 75 gram/ 500 ml in water, 100 gram/500 ml in water. The result showed the toxicity test for both extracts cause mortality 43.33% from concentration 75 gram/500 ml in water.

ABSTRAK. Merauke sebagai kabupaten terujung timur dari wilayah NKRI, selain dikenal dengan area perbatasannya juga menghasilkan tanaman sagu (Metroxylon sp.). Bagian dari tanaman sagu yaitu pelepahnya kemudian dimanfaatkan oleh masyarakat setempat menjadi material penyusun dinding rumah. Berdasarkan hasil wawancara, rumah ini selanjutnya dikenal masyarakat Merauke dengan sebutan Rumah Gaba-Gaba. Penerapan Rumah Gaba-Gaba bukan hanya ada di daerah perkotaan tetapi dijumpai juga di daerah lain seperti pedalaman di sekitar Distrik Merauke. Untuk di daerah kota, Rumah gaba-gaba semakin berkurang. Pembelajaran detail sambungan kontruksi gaba-gaba di bangku perkuliahan jurusan bangunan (arsitektur dan teknik sipil) juga sekolah menengah kejuruan bidang teknik bangunan juga tida dijumpai. Penelitian ini kemudian bertujuan melihat bagaimana detail sambungan pelepah sagu pada dinding Rumah Gaba-Gaba di perkotaan Merauke serta menemukan bagaimana potensi dan tantangan pelestarian Rumah Gaba-Gaba dalam kaitannya dengan akses memperoleh material sagu di daerah perkotaan. Penelitian ini menggunakan metode penelitian kualitatif, jenis metode yaitu observasi terlibat dan pengambilan data ethnografis. Teknik pengambilan data secara tidak acak, teknik purposive sampling. Observasi/pengamatan dan wawancara dengan teknik penyajian data yaitu dengan verbatim. Hasil penelitian ini adalah gambar sambungan dinding pelepah sagu dimana terdapat kayu list ukuran 2/2 mengapit gaba-gaba, antar gaba disambung dengan tusukan bambu (seperti tusukan sate) dengan jarak antar tusukan adalah tidak saling sejajar secara vertikal dan juga kajian potensi dan tantangan pelestarian rumah material sagu area perkotaan Merauke. Kata kunci: pelepah sagu, dinding, material lokal ABSTRACT. Merauke, the easternmost district of the Republic of Indonesia, besides being known for its border area, also produces Metroxylon sp., the sago plants. Part of the sago plant, namely sago midrib, is then used by the local community to become the building material for the walls of the houses. Based on the interview results, information was obtained that this house was later known as Rumah Gaba-Gaba. The application of Rumah Gaba-Gaba exists in urban areas and can also be found in other areas such as the rural around Merauke District. The application of Rumah Gaba-Gaba exists in urban areas and can also be found in other areas such as the rural around Merauke District. However, it is found that the application of Gaba-Gaba wall construction is decreasing in urban areas. Then learning the details of this construction in the lectures majoring in building (architecture and civil engineering) and vocational high schools in building engineering is not there. This research then aims to see how the details of the connection of the sago midrib on the walls of the Rumah Gaba-Gaba in Merauke city and find out how the potencies and challenges of preserving the Rumah are preserved Gaba-Gaba are related to access to sago material in urban areas. This research uses qualitative research methods. The types of methods are involved observation and ethnographic data collection. The collecting data is not a random, purposive sampling technique—observations and interviews with data presentation techniques, namely verbatim. The results of this study are a picture of the connection of the Gaba-Gaba wall where there is a list of 2/2 size wood flanking the Gaba-Gaba. Between the Gaba is connected with a bamboo puncture (such as a satay puncture). The distance between the punctures is not parallel to each other vertically. It is also a study of the potential and challenges for the conservation of sago material houses for the urban area of Merauke.Keywords: sago midrib, wall, local material