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Beberapa Sifat Biologi Tanah Kebun Jeruk Siam (Citrus nobilis Tan) pada Sistem Monokultur dan Tumpangsari dengan Beberapa Tanaman Sayuran di Desa Sekaan Kecamatan Kintamani I WAYAN BUNADA; ANAK AGUNG ISTRI KESUMADEWI; I WAYAN DANA ATMAJA
Agrotrop : Journal on Agriculture Science Vol 6 No 2 (2016)
Publisher : Fakultas Pertanian Universitas Udayana

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Some Biological Soil Properties of Orange Orchard (Citrus nobilis Tan)under Monoculture and Intercropping System with some Vegetable Cropsin Sekaan Village of Kintamani Districts. Orange fruit is of economically importantcommodity in Bali. The fruits mostly produced in Bangli Regency including KintamaniDistrict under intensified monoculture and intercropping with vegetable crops. Those systemspredicted contribute to variation of soil biological properties as the results of differences inmagnitude of agrochemicals that being used. A research about soil biological properties oforange orchard land was conducted in Sekaan Village of Kintamani on November 2015 -March 2016. The purpose of the study was to differenciate the soil biological propertiesamong the common cropping pattern applied in the study area, namely: monoculture oforange, and either intercropping of orange with cabbage (Brassica oleracea), tomatoes(Solanum lycopersicum), chilli (Capsicum annum L.), or cucumber (Cucumis sativus). Threereplications of rhizosperic soil samples were collected from each planting systems andproceed for selected soil analysis. The measured parameters were soil pH, organic-C, as wellas the respective total population number of soil microorganisms, fungi, Gram (+) and Gram(-) bacteria, and also soil respiration. The results showed that total population number of soilmicroorganisms and total fungi were significantly higher on intercropping compare tomonoculture systems. No significant different of those present among soils that cultivatedwith different vegetable crops. In contrary, no differences were also observed for both soilrespiration value and total number of G (+) and G (-) bacteria among soils differing incropping pattern.

Kajian Status Kesuburan Tanah untuk Menentukan Pemupukan Spesifik Lokasi Tanaman Padi I NYOMAN PUJA; I WAYAN DANA ATMAJA
Agrotrop : Journal on Agriculture Science Vol 8 No 1 (2018)
Publisher : Fakultas Pertanian Universitas Udayana

Study of Soil Fertility Status to Determine Specific Fertilizer Locations of Rice Plants. Soil fertility status is one of the tools to determine balanced fertilization. The use of inorganic fertilizers continuously at high doses will accelerate the depletion of other elements which cause imbalance of nutrients in the soil. This research was carried out in Abang-Karangasem District. The purpose of this study was to compile location-specific fertilizer recommendations based on their soil fertility status. This research was conducted by survey and laboratory analysis method with activity step: preparation (making of land unit), field survey, soil sample analysis, evaluation of soil fertility status and determination of location-specific fertilizer recommendations. The results showed that soil fertility status in Abang District is low and medium. Recommended fertilization without straw return for areas with low fertility status are 250 kg Urea/ha, 100 kg SP36/ha and 50 kg KCl/ha. Whereas if with straw returned (5 t/ha) are 230 kg Urea/ha, 100 kg SP36/ha and 50 kg KCl/ha. Recommended fertilization without straw return for areas with medium fertility status are 250 kg Urea/ha, 75 kg SP36/ha and 50 kg KCl/ha. Whereas if with straw returned (5 t/ha) are 230 kg Urea/ha, 50 kg SP36/ha and 0 kg KCl/ha.

Kajian Paket Dosis Semi Organik terhadap Sifat Tanah dan Hasil Tanaman Padi (Oryza sativa L) I WAYAN NARKA; I NYOMAN DIBIA; I WAYAN DANA ATMAJA
Agrotrop : Journal on Agriculture Science Vol 10 No 2 (2020)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2020.v10.i02.p01

The study of packages of semi-organic fertilization on soil properties, and yield of rice (Oryza sativa L). The aim of this study was to know the effect of semi organic fertilization doses on soil properties and yield of rice. The Randomized block design (RBD), with 3 replications and 9 treatments was used in this study. P0 (without fertilizer), P1 (25 tons of organic fertilizer ha-1), P2 (300 kg of Urea ha-1, 150 kg SP36 ha-1 and 75 kg KCl ha-1), P3 (biourin liquid fertilizer) P4 (½ P1 + ½ P2), P5 (½ P1 + ½ P3, P6 (½ P2 + ½ P3), P7 (2/3P1 + 1/ 3 P2) and P8 (2/3P3 + 1/3P2). The results showed that the application of semi-organic fertilizer on soil properties such as soil salinity, C-organic content, P-available and Nitrogen content of soil significantly affected by the treatment, while potasium_available and soil pH is not significantly affected by the treatment. Yield of rice had a very significant effected by treatment. The semi-organic fertilizer P4 (combination of 50 % anorganic + 50 % organic compost) and P6 (combination of 50 % inorganic + 50 % biourine) can produce oven dry grain 33.35 g per bushel and 32.63 g per bushel respectively or increased 57.91 % and 54.50 % of controls.

Pemanfaatan Biochar sebagai Pembawa Rhizobium terhadap Pembentukan Bintil Akar dan Hasil Tanaman Kedelai (Glycine max L. Merril) NI PUTU NENA LUSIANA; ANAK AGUNG NGURAH GEDE SUWASTIKA; I WAYAN DANA ATMAJA; ANAK AGUNG ISTRI KESUMADEWI
Agrotrop : Journal on Agriculture Science Vol 11 No 2 (2021)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2021.v11.i02.p08

The Utilization of Biochar as a Carrier of Rhizobium for the formation of root nodules and Yield of Soybean (Glycine max L. Merril). This study aims to determine the effect of the type of raw materials and particle size of biochar as a Rhizobium carrier on the formation of nodules in soybean plants. This research was conducted from September to November 2020 at the Experimental Station and Laboratory of Soil and Environmental Sciences, Faculty of Agriculture, Udayana University. The research design used was a randomized block design with nested patterns with 2 factorials and 3 replications. The treatment factors consisted of B1 = bamboo biochar, B2 = albasia wood biochar, B3 = corncob biochar, B4 = young coconut skin biochar, P1 = (0,15-0,50 mm), P2 = (>0,50-1,68 mm), P3 = (>1,68-3,36 mm). The parameters observed included effective nodule, nodule size, total bacterial population, ammonium, nitrate, and plant yield. The result of the analysis showed that the type of biochar raw materials had a very significant effect on the parameters of effective nodules, nodules size, total bacterial population and plant yield, but had no significant effect on soil chemical parameters. The treatment of biochar particle size had a very significant effect on the parameters of effective nodules, total bacterial population, and plant yield, and had a significant effect on the size of nodules, but had no significant effect on soil chemical parameters. The conclusion of this study is that the type of raw material for albasia wood biochar is effective as a Rhizobium carrier, which is indicated by the high number of effective nodules, nodules size and total bacterial population of 0,15-1,68 mm particles.

Identifikasi Jamur Pada Pupuk Organik Cair (POC) Limbah Dapur Di Desa Sanur Kauh ARDHIKA FAHRIZA HARVIANTO; NI WAYAN SRI SUTARI; I WAYAN DANA ATMAJA
Agrotrop : Journal on Agriculture Science Vol 12 No 1 (2022)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2022.v12.i01.p12

Identification of Fungi in Kitchen Waste Liquid Organic Fertilizer (LOF) in Sanur Kauh Village. Decomposed kitchen waste contains certain microorganisms, one of which is fungus. Fungi are one of the microorganisms that are widespread in soil and water and have the potential in the process of decomposition of organic matter. The research objective was to determine the composition of kitchen waste and obtain fungi species from LOF of kitchen waste in Sanur Kauh Village. The research was conducted from September to December 2020. Sampling was conducted in Sanur Kauh Village, South Denpasar District. Furthermore, LOF making and analysis was carried out at the Laboratory of Soil and Environmental Sciences, Faculty of Agriculture, Udayana University and at the Indonesian Genetika Science Laboratory, Tangerang. The method used is a descriptive analysis experiment, which consists of field exploration, laboratory analysis and molecular identification. The results showed that the most dominant percentage of LOF from kitchen waste composition was fruit at 46.69% followed by vegetables at 24.17%, rice at 18.92%, egg shells, bones and meat at 5.16% and the remaining side dishes of 5.06%. The results of molecular identification of fungal species on LOF fermentation of kitchen waste isolates LDA 2 and LDB 2 were similar to Pichia kudriavzevii strain CBS5174 chromosome 2 (99.71%) and Pichia kudriavzevii culture CBS: 5147 (99.56%).

Pengaruh Residu Pemberian Abu Vulkanis Gunung Agung dan Pupuk Kompos terhadap Tanah dan Tanaman Kacang Tanah (Arachis hypogaea L.) I WAYAN NARKA; I DEWA MADE ARTHAGAMA; I WAYAN DANA ATMAJA
Agrotrop : Journal on Agriculture Science Vol 12 No 2 (2022)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2022.v12.i02.p05

Residual Effect of Mount Agung Volcanic Ash and Compost on Soil and Peanut Plants (Arachis hypogaea L.). Research on the application of Mount Agung volcanic ash and compost has been carried out with cowpea as an indicator plant, but volcanic ash has not shown any effect. The volcanic ash of Mount Agung is in the form of material that has not been weathered, so to accelerate weathering it is necessary to add organic matter. The purpose of this study was to determine the residual effect of giving volcanic ash and compost on soil and peanut plant. The design used was a factorial randomized block design with 3 replications. The volcanic ash factor consists of 3 levels, namely A0 = no volcanic ash, A1 = 10% volcanic ash and A2 = 30% volcanic ash. The compost factor consists of 3 levels, namely K0 = without compost, K1 = 10 tons of compost ha-1, and K2 = 20 tons of compost ha-1. Parameters of soil properties observed were : total porosity, nitrogen, phosphorus and potassium content and C-organic matter content. Observation of peanut plants included : plant height, number of pods, weight of oven-dried pods, weight of oven-dried seeds and weight of oven-dried peanut stem. The results of research showed that there was no interaction between the treatment of volcanic ash residue and compost residue on the soil and peanut plants, while the single treatment of compost residue had a significant effect on peanut plants. The treatment of volcanic ash residue has not shown a significant effect, both on the soil and on peanut plants.

Hubungan Kadar Bahan Organik Tanah dengan Keanekaragaman Makrofauna Tanah pada Lahan Pertanian di Kecamatan Baturiti STEFANIA DESYANI DERGONG; A.A. ISTRI KESUMADEWI; I WAYAN DANA ATMAJA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.11, No.3, Juli 2022
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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The Relationship between Soil Organic Matter Levels with Diversity of Soil Macrofauna on Agricultural Land in Baturiti District This study aims to determine the level of soil macrofauna diversity on agricultural land in Baturiti District and to determine the relationship between soil organic matter levels and soil macrofauna diversity on agricultural land in Baturiti District. Sampling locations were taken on two types of land use, two organic land cultivation systems at an altitude of 903-1259 meters above sea level and conventional land at an altitude of 925-1173 meters above sea level. The method in this study is the sampling method, taking soil macrofauna and soil organic matter by direct observation to the research location at the sampling point, namely 5 types of organic agricultural plants and 5 types of conventional agricultural plants which are considered representative of the presence of soil macrofauna and represent each type of plant in the study area. Soil macrofauna sampling was carried out using 2 methods, namely pit fall trap, quadratic method and hand sorting. Sampling of organic matter was carried out by hand sorting method, on organic and conventional land in Baturiti District. Soil macrofauna found in organic and conventional land were identified and calculated values: Diversity index (H'), Abundance index (R1), Dominance (C). Soil from organic and conventional land was analyzed for organic matter content (C). The data obtained were analyzed by hypothesis testing (t) using the SPSS application to determine the relationship between soil organic matter content and soil macrofauna. The results of this study indicate that the level of soil macrofauna diversity on organic land with an altitude of 903-1259 mdpl is in the medium category (1.493- 2.421) and the level of soil macrofauna diversity on conventional land with an altitude of 962- 1318 mdpl is in the medium category (1.011- 1,961). On organic land with an altitude of 903- 1259 mdpl and conventional land with an altitude of 962 mdpl and 1173 mdpl, there is no relationship between soil organic matter content and macrofauna diversity. Based on the results of the hypothesis test, it was shown that it was rejected. On conventional land with an altitude of 1318 meters above sea level, there is a relationship between soil organic matter content and macrofauna diversity. Based on the results of the hypothesis test, it shows that it is accepted.

Pengaruh Penambahan Pasir dan Kompos terhadap Pertumbuhan Bibit Kaliandra dan Beberapa Sifat Tanah I WAYAN NARKA; I WAYAN DANA ATMAJA
Agrotrop : Journal on Agriculture Science Vol 13 No 2 (2023)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2023.v13.i02.p10

Study on Effect Applications Sand and Compost on growth of kaliandra and soil properties. The purpose of this study was to determine the effect of giving sand and compost on growth of kaliandra and soil properties. The design used was a factorial randomized block design with 3 replications. The giving of sand factor consisted of 3 levels: P0 = no sand, P1 = 10% sand and P2 = 30% sand. The compost factor consisted of 3 levels: K0 = without compost, K1 = 10 tons of compost ha-1, and K2 = 20 tons of compost ha-1. The observation of growth of kaliandra consisted : plant height, fresh weight of shoot and root of kaliandra, dry weight of shoot and root of kaliandra. Parameters of soil properties were observed: bulk density, C-organic matter content, Nitrogen content of soil and available of Phosphor dan Kalium of soil. The results of research showed that, no interaction between the treatment of giving sand and compost on the soil properties and growth of kaliandra, while the single treatment of compost had a significant effect on growth of kaliandra. The treatment of giving sand has not shown a significant effect, both on soil properties and on growth of kaliandra.

Hubungan Kadar Bahan Organik Tanah dengan Keanekaragaman Makrofaun Tanah pada Lahan Pertanian di Kecamatan Baturiti STEFANIA DESYANI DERGONG; A.A. ISTRI KESUMADEWI; I WAYAN DANA ATMAJA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.11, No.4, Oktober 2022
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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The Relationship between Soil Organic Matter Levels with Diversity of Soil Macrofauna on Agricultural Land in Baturiti District This study aims to determine the level of soil macrofauna diversity on agricultural land in Baturiti District and to determine the relationship between soil organic matter levels and soil macrofauna diversity on agricultural land in Baturiti District. Sampling locations were taken on two types of land use, two organic land cultivation systems at an altitude of 903-1259 meters above sea level and conventional land at an altitude of 925-1173 meters above sea level. The method in this study is the sampling method, taking soil macrofauna and soil organic matter by direct observation to the research location at the sampling point, namely 5 types of organic agricultural plants and 5 types of conventional agricultural plants which are considered representative of the presence of soil macrofauna and represent each type of plant in the study area. Soil macrofauna sampling was carried out using 2 methods, namely pit fall trap, quadratic method and hand sorting. Sampling of organic matter was carried out by hand sorting method, on organic and conventional land in Baturiti District. Soil macrofauna found in organic and conventional land were identified and calculated values: Diversity index (H'), Abundance index (R1), Dominance (C). Soil from organic and conventional land was analyzed for organic matter content (C). The data obtained were analyzed by hypothesis testing (t) using the SPSS application to determine the relationship between soil organic matter content and soil macrofauna. The results of this study indicate that the level of soil macrofauna diversity on organic land with an altitude of 903-1259 mdpl is in the medium category (1.493- 2.421) and the level of soil macrofauna diversity on conventional land with an altitude of 962- 1318 mdpl is in the medium category (1.011- 1,961). On organic land with an altitude of 903- 1259 mdpl and conventional land with an altitude of 962 mdpl and 1173 mdpl, there is no relationship between soil organic matter content and macrofauna diversity. Based on the results of the hypothesis test, it was shown that it was rejected. On conventional land with an altitude of 1318 meters above sea level, there is a relationship between soil organic matter content and macrofauna diversity. Based on the results of the hypothesis test, it shows that it is accepted.

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