Abstract. Nontji M, Muis A, Nonci N, Nonci N, Amran FD. 2019. Evaluating the potential of indigenous Rhizobacteria as biofertilizer and biopesticide against Rhizoctonia solani. Nusantara Bioscience 11: 79-83. Rhizobacteria are living in area of plant roots, some of them are potential as biofertilizers and biopesticides agents. This study aims to evaluate the potential of 10 isolates indigenous rhizobacteria as biofertilizer and biopesticide against banded leaf and sheath blight disease on corn. The potential of biofertilizer was evaluated by ability fixing nitrogen in Burk’s N free medium, dissolving phosphate and producing Indole Acetic Acid (IAA) hormone with spectrophotometry method. The potential of biopesticide was evaluated by synergistic of analysis with double culture method. The result of study showed that the best indigenous rhizobacteria was isolated code 10. It has potential as a biofertilizer agent (0.22% for fixing nitrogen, 18.875 ppm for dissolving phosphate and producing IAA hormone 1.524 ppm). It is also having potential as biopesticide agent against Rhizoctonia solani with relative inhibition level (RIL) of 31.3%. Isolate code 10 and code 6 are able to live in synergy so that it can be recommended as biofertilizer and biopesticide agent to form the consortium as a biological fertilizer.

Soil morphology provide overview the evolution in the soil body through description and interpretation of soil profile properties as initial information in classifying soil. The research purpose is to determine the morphological characteristics and soil classification of Inceptisols in four study profiles: Kalonding, Batu Papan, Pepalang and Batu Ampat, in Mamuju regency, West Sulawesi. The research method used is descriptive qualitative exploration by survey in the field and soil analysis in the laboratory. The results showed that the dominant texture was clay in all soil profiles with a low silt/clay ratio. This was related to the high intensity of weathering due to high rainfall and easily weathered host rock and relatively high content of resistant minerals. Other chemical properties such as pH, N-total, cation exchange capacity, base saturation, exchangeable bases (Ca, Mg, K, Na) and P-available are generally low with a relatively constant distribution pattern with increasing depth. Soils are classified into the order of inceptisols in all soil profiles because they have a cambic sub-horizon resulting from physical alteration, chemical transformation or a combination of these processes. The hicks humidity regime so that the sub-order category is named udepts. The temperature regime includes Isohipthermic so that it is categorized into the Great Group Dystrudepts and the Typic Dystrudepts sub-group for the Study Profile of Batu Papan, Pepalang and Batu Ampat, while for the Profile of the Kalonding study is Lithic Dystrudepts.

Pemanfaatan Sabut Kelapa Menjadi Media Tanam Cocopeat dalam Upaya Peningkatan Ekonomi Masyarakat Desa  Pitue Kecamatan Ma’rang Kabupaten Pangkep. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pengetahuan dan keterampilan sumberdaya manusi (SDM) pada kelompok ekonomi desa Pitue dalam memanfaatkan sabut kelapa menjadi media tanam cocopeat. Kegiatan ini dilakukan dengan metode penyuluhan, pelatihan dan pendampingan pemanfaatan sabut kelapa menjadi media tanam cocopeat dengan cara sederhana, menggunakan alat  dan bahan yang mudah diperoleh dan dapat dilakukan oleh semua masyarakat. Hasil kegiatan pengabdian ini adalah masyarakat desa Pitue Kecamatan Ma’rang Kabupaten Pangkep bertambah pengetahuan dan keterampilannya dalam pemanfaatan sabut kelapa menjadi media tanam cocopeat, selanjutnya dapat meningkatkan pendapatan rumah tangga.

Plant health is a very important factor in the agriculture system. The presence of plant hormones such as Auxin, gibberellic acid, and siderophores with variation numbers in the plant gives different effects on plant health. Related to the environment rich with rhizobacteria, they have a unique function because rhizobacteria can produce a chemical compound known as Plant Growth Promoting Rhizobacteria (PGPR). The purpose of the research is to study the production of auxin, gibberellic acid, and siderophore from rice rhizobacteria as the source of potential hormones for plant growth. Ten rhizobacteria isolates have been isolated from the rice rhizosphere. They are potential candidates as biofertilizers and biopesticide agents. The hormone production from each isolate was tested by spectrophotometric methods: Auxin at a wavelength of 535 nm with Salkowski's reagent, gibberellic acid at 254 nm, and siderophores at 560 nm with Hardaway's reagent. The results showed the highest auxin hormone was obtained from isolate 10 (3.374 ppm), the highest gibberellic acid from isolate 4 (3.960 ppm), and the highest siderophores hormone from isolate 2 (2.910 ppm). The conclusion of the research is, plant growth regulator from rice rhizobacteria has the potential increasing plant health.

Agroforestry is described as the land-use system producing and conserving various agricultural, livestock, and fishery commodities combined with forestry commodities. The research aims to determine the chemical properties of the soil and types of microbial (especially the presence of soil bacterial) in the cocoa farming system. The two types of analysis were conducted: (1) Soil chemical properties included pH, C-organic, N-total, Pavailable, and Potassium; (2) the type and number of bacterial. The research from November 2018 to July 2019 at Mamuju Regency, West Sulawesi. Soil samples used the sampling method (ring and composite). The analysis results showed the soil pH ranged from acidic to slightly acidic (between 4.73-5.76). The content of C-organic ranging from (1.39-2.56%); N-total value is very low (0.20-0.25%); P-available is low (15.6-15.91 ppm) and Potassium also low (0.13-0.21 cmol kg -1 ). The genus of bacterial found in the research location: Pseudomonas in Kalonding (289 cfu), Boda Boda (238 cfu), and Sisango (220 cfu); Alkaligenes were found in Salukayu 2 (255 cfu) and Salumasa (220 cfu) and Klebsiella were found in Batupapan (265 cfu).