Completely Randomized Design Method Research Articles

The Effect Of Breadfruit Flour Substitution On The Quality Of Bengkulu Bay Tat Cake

Bay tat cake is a cake which means two syllables bay comes from the Bengkulu language which means parent, while tat means tart. This cake has a meaning as a typical Bengkulu tart. The main ingredient in making bay tat cake is wheat flour which is still imported. Imports of wheat flour can be reduced by developing products from local flour, such as breadfruit flour. Breadfruit flour is gluten-free flour produced from breadfruit and cultivated naturally, and contains high calcium and fiber so it can replace wheat flour”. This study discusses the effect of substitution of quality (shape, color, aroma, texture and taste) of bay tat cake with breadfruit flour as much as 25%, 50% and 75%. This type of research is purely experimental with a completely randomized design method (CRD) with three treatments and three treatments. The data used is primary data obtained directly from 3 expert panelists who provide answers from a questionnaire (organoleptic test format) on the quality of breadfruit flour bay tat cake. The data that has been obtained is then tabulated in the form of a table and an Analysis of Variance (ANOVA) is performed. If the analysis of variance shows Fcount > Ftable, then it is continued with Duncan's test. The results showed that there was no significant effect on the quality of the shape, color, texture and taste of breadfruit flour bay tat cake. but there is a significant effect on the quality of the aroma of the bread tat bay tat cake. The results of the quality test of the best bay tat breadfruit flour cake are on the quality of the neat square shape X0, the quality of the surface shape X2, the quality of the yellow-brown color X1, the quality of the fragrant aroma X0, the quality of the solid texture X2 and the quality of the taste X0.

The Vitamin C Potential of Sorrel Tree (Averrhoa bilimbi) as LATEX Coagulant

This research aims to determine the vitamin C potential of tree sorrels (Averrhoa bilimbi) as a natural latex coagulant. The researchers employed the Completely Randomized Design (CRD) method. The method consisted of three repetitions with five treatments, namely negative control (without clotting) and positive control, by administering tree sorrel extract (Averrhoa bilimbi) with a volume of 5 ml, 10 ml, 15, and 20 ml. The researchers tested the vitamin C levels using UV-VIS Spectrophotometry DR 6000 with a wavelength of 265 nm to 271 nm. Furthermore, the data were analyzed using the One-Way ANOVA statistical test and the LSD to determine the most effective volume as a latex coagulant. The quantitative data were the clotting time and latex weight. The results showed that tree sorrel extract could be used as a latex coagulant. The fastest duration (1.18 minutes) and the highest weight (34.30 grams) of latex were found in the 20 ml volume. At the same time, the lowest yield was at a volume of 5 ml with a clotting time of 5.4 minutes and a weight of 18.62 grams.

Effect of Undegraded Dietary Protein, Probiotic, and Premixes in Complete Rations on Fat-Tailed Sheep Productivity

<p class='IJASEITAbtract'>Low ration efficiency and Average Daily Gain (ADG) are the key issues that sheep breeders face nowadays. This is because the quality of rations provided is still low, resulting in livestock productivity that is not optimal with its genetic potential. One of the efforts that can be done is by supplementing protected protein (Undegraded Dietary Protein) and probiotics to improve the quality of sheep rations. The aim of this study is to know the effect of administration UDP, Probiotic, and Premix on the fat-tailed sheep productivity. This study used a completely randomized design method (CRD) with 5 treatments, namely R0 (Standard Complete Feed), R1 (Standard Complete Feed with UDP Protein Source), R2 (R1 + Premix), R3 (R1 + Probiotics), and R4 (R1 + Premix + Probiotics). The statistical test used was ANOVA and then it would be followed by Duncan’s Multiple Range Test if the results were significant. According to the research, all treatments have no real effect (P < 0.05) against the Digestibility of Dry Matter (DDM) and the of Organic Matter (DOM). However, when compared to the control, almost all treatments have a higher value than the control. Whereas in the parameters of body Weight Gain (WG) and Dry Matter (DM) consumption, all treatments had significantly different effects (P > 0.05) with P4 (R1 + Premix + Probiotics) providing a value higher than all other treatments. As a result, the provision of rations containing UDP and Probiotics has the potential to increase sheep productivity.

PENGARUH LAMA PENYIMPANAN TELUR HERBAL AYAM RAS FASE KEDUA PADA SUHU REFRIGERATOR TERHADAP PENURUNAN BERAT TELUR, DIAMETER RONGGA UDARA, DAN INDEKS ALBUMEN

This research aimed to determine the effect of storage time of herbal eggs of layer second phase at a temperature of refrigerator on egg weight, air cavity diameter, and albumen index and to find out the best storage time for the herbal eggs quality. This research was conducted on 7 October - 4 November 2020 at the Animal Production Laboratory, Department of Animal Husbandry, Faculty of Agriculture, University of Lampung. This study used a completely randomized design method (CRD) with 5 treatments of egg storage time for 0, 1, 2, 3, and 4 weeks. The data obtained were analysed using analysis of variance (ANOVA). If there was a significant effect of the ANOVA, the Least Significant Difference (LSD) test was carried out at 5% level. The results of this study indicated that the herbal egg storage time treatment had a significant effect (P &lt;0.05) on the decrease of egg weight, air cavity diameter, and albumen index. The 1 week storage period gave the best effect on the lowest egg weight reduction, namely 0.90%, the lowest air cavity diameter (1.752 cm), and the highest albumen index (0.061) compared to the storage time of 2, 3, and 4 weeks.&#x0D; &#x0D; Keywords: Albumen index, Air cavity diameter, Egg weight, Refrigerator temperature, Storage time

Pengaruh Subtitusi Tepung Terigu Dengan Tepung Biji Alpukat (Persea Americana Mill) Terhadap Tingkat Kesukaan Cookies

Cookies are one of the food products that are popular with the public. The raw material for making cookies is wheat flour, which is still imported from abroad and year by year the number of imports from abroad continues to increase. Utilization of avocado seed flour will reduce the use of wheat flour and can also reduce waste from avocados. The main factor in fulfilling the quality of a product can be assessed based on the appearance of the product, the taste of the product, and the nutritional value of a product. This study aims to analysed the level of preference (taste, aroma, texture, and colour) of cookies through organoleptic tests. The design of this study used an experimental study using the RAL (Completely Randomized Design) method with two replications. Avocado seed flour substitution formulation in 4 treatments, namely control (P1), 30% (P2), 50% (P3) and 70% (P4). The research location is at the State University of Medan. The subjects (untrained panellists) of this study were 25 people. The data from the organoleptic test were analysed descriptively using the percentage of respondents' acceptance from each treatment level and to determine the effect of avocado seed flour substitution on the treatment, Kruskal Wallis statistical analysis was used. The results of this study indicate that the best formula for cookies with 50 percent substitution of avocado seed flour obtained an average value of 1.2 for taste, 0.3 for colour, 0.6 for texture, and for aroma 0.3 with a total value of 2, 4. Based on the results of the Kruskal Wallis test, it is known that there is a significant difference in perception seen from the level of preference for colour, aroma, taste, and texture of avocado seed flour cookies (p = 0.000).

Reduction of River Pollutants with Raffia-Cord in Sail River Pekanbaru Indonesia

The Sail River has been polluted by various types of pollutants in Pekanbaru. Raffia-cord is shaped like a feather duster, made of raffia rope that has been smoothed and then woven like a feather duster. This research was conducted as an effort to reduce the river pollutants (nitrate, phosphate, ammonia, Pb, Cr, COD, and BOD5. The study was carried out in Sail River in March – April 2019 using the Completely Randomized Design (CRD) method with density variations: low density (P1), medium density (P2), and high density (P3). The average results showed that the decrease for nitrate was 0.075-0.117 mg/L (35-44%) from 0.136-0.347 mg/L; phosphate 0.205-0.267 mg/L (29-40%) from 0.339-0.381 mg/L; ammonia 0.027-0.076 mg/L (28-58%) from 0.093-0.108 mg/L. The decreasing effectiveness of P1, P2, and P3 for Pb were 67.146%, 70.465% and 67.242%; for Cr were 81.346%, 83.335% and 81.893%. The average COD reduction effectiveness were 38.7%; 46.9%; 42.5% while BOD5 were 71.4%, 74.1% and 69.5%. It was concluded that raffia-cord could be used to reducing nitrate, phosphate, and ammonia levels, raffia-cord was able to reduce the concentration of Pb and Cr but raffia-cord had no significant effect on decreasing COD and BOD5.

Pengaruh Berbagai Jenis Media Dan Lama Penyimpanan Benih Terhadap Viabilitas Dan Vigor Benih Kakao (Theobroma cacao L.)

Effect of Various Types of Media and Duration of Storage of Seeds on Viability and Vigor of Cocoa (Theobroma cacao L.) Seeds. The method used in this research is the Factorial Completely Randomized Design (CRD) method, which consists of 2 treatment factors, Factor I, namely storage media with 4 treatment levels, namely: M0 without storage media; M1 = use of PE plastic; M2 = use of aluminum foil; M3 = use of gunny sacks; M4 = using a glass bottle. each treatment was repeated 2 (two) times. The second factor is storage time with 3 levels of treatment, namely: W1 = stored for 1 (one) week; W2 = stored for 2 (two) weeks; W3 = stored for 3 (three) weeks. The parameters observed in this study were viability and vigor. seed growth rate (%). Simultaneous growth of seeds (%), potential for seed growth (%), germination of seeds (%).From the research results can be concluded as follows:1.) the use of various types of seed storage media (M0) (without treatment), M1 (PE plastic), M2 (aluminum paper), M3 (gunny sacks), and M4 (glass bottles) are treatments that give no real results at age. 1-3 days after planting and the yields were very real at the age of 4-7 days after planting on the speed of seed growth, gave no real results at the age of 1-4 dast and the results were very real at the age of 5-7 days against the synchronization of seed growth, giving no real results at age 3 days after planting and was very significant at the age of 4-5 days after planting on the potential for seed growth, and gave very real results on the germination capacity of seeds. 2. The duration of 1 week of storage (M1) has a very significant effect on all parameters, namely the speed of seed growth, simultaneous growth of seeds, potential for seed growth and germination, while the storage time is 2 minutes (M2) and storage time is 3 minutes (M3). ), has no significant effect on all observed parameters, 3. The interaction of the two treatment factors has a very significant effect on all parameters, namely the speed of seed growth, synchronization of seed growth, potential for seed growth and germination

UJI TOKSISITAS AKUT EKSTRAK ETANOL DAUN KAYU MANIS (Cinnamomum burmanii) PADA FUNGSI HATI TIKUS PUTIH (Mus musculus L.) BETINA

Cinnamon leaves (Cinnamomum burmanii) are plants that have many pharmacological effects including lowering blood sugar levels, inhibition of bacterial growth, antioxidants and mymetic insulin activity. However, acute toxicity testing has not been carried out on cinnamon leaves before. This study aims to determine the level of toxicity and effect of extract administration on SGOT, SGPT as well as changes in the histopathological form of the liver of test animals. This study used The Complete Randomized Design method with 5 treatment groups with na-CMC administration 0.5% as a negative control, P1 dose 250 mg/kgBB, P2 Dose 500 mg/kgBB, P3 dose 1000 mg/kgBB and P4 at a dose of 2000 mg/kgBB. Each treatment consists of 5 mice. The parameters observed in this study are SGPT, SGOT and histopathological examination of mice liver organs. The data was analyzed using the One Way ANOVA test with duncan's advanced test. The results showed that the administration of cinnamon leaf ethanol extract did not cause death in test animals so it was practically not toxic. SGPT and SGOT values in female white mice test animals showed statistically meaningful differences in SGPT and SGOT values (p&lt;0.05) compared to negative controls. However, it is still in the normal range. The result of histopathological observations is that there is a change in hepatocytes of liver organs compared to negative control.

Pengendalian infestasi ektoparasit (Agulus sp.) Pada benih ikan mas (Cyprinus carpio) dengan menambahkan garam (NaCl) di pasar ikan hias gunung sari Surabaya

This study aims to determine the effectiveness of adding salt (NaCl) to ectoparasite Argulus sp. which infested goldfish (seedsCyprinus carpio) from the Gunung Sari Ornamental Fish Market, Surabaya. This research was carried out by taking samples from one of the ornamental fish cultivation sites in Surabaya with a total of 250 goldfish seeds. This study used 25 containers as research media with 10 goldfish seeds each. Each treatment was repeated five times, namely with the salt concentration P1 = 54 grams/liter, P2 = 108 grams/liter, P3 = 162 grams/liter, P4 = the negative group or the untreated group and P5 = positive control using methylene. blue 3 grams/liter. Ectoparasite examination Argulus sp.. conducted at the Parasitology Laboratory, Faculty of Veterinary Medicine, Wijaya Kusuma University, Surabaya. The completely randomized design method (CRD) was used in the study. The results were tested by ANOVA and a significant value of 5% (α 0.05). The test results showed that the treatment with methylene blue was not significantly different from the treatment of the three salt concentrations which had the same effectiveness. So the ANOVA test results show that all treatments are not significantly different.

The Influence of Different Curcuma zanthorrhiza Dosage To The Growth and Survival Rate Of Nile Tilapia (Oreochromis niloticus)

The research was held in 14th July – 20th August 2018. Located in Brackish water Laboratory, Fisheries Faculty of Pekalongan University. The aim of this research is to find out the impact of curcuma to increase the growth and survival rate of Nile Tilapia. The treatment that be implemented was extending dosage of curcuma flour (gram) in 1 kg of artificial fish feed, such as followed : treatment A 0 ml ( control), B 9 g of curcuma, C 12 g curcuma and D 15 g curcuma. The method used was the Completely Randomized Design Method consisting of 4 treatments and 3 replications. The result which had given from the research was treatment D showed the highest growth. The average of weight of fish which can be reached by every treatment A, B, C, D as described 3,31 g, 4,77 g, 6,8 g, and 8.04 g, The analysis of result showed that all treatments have different effects for growth of fish. The water quality during the research such as temperature between 27-290 C, pH revolve 7,1-7,3 and the salinity was 16-17 ppt which mean all parameters was supported to fish growth.

Characteristics of Charcoal Briquwttes from Palm Oil Midrib and Coconut Midrib with Tapioka Glue

The purpose of this study aims to get the best combination of palm oil midrib and coconut midrib in making charcoal briquettes. The study was conducted experimentally using a complete randomized design method consisting of 5 treatments and 3 replications. The treatments in this study were the ratio of palm oil midrib and coconut midrib charcoal as follows: KSK1 (100:0), KSK2 (75:25), KSK3 (50:50), KSK4 (25:75) and KSK5 (0:100). The parameters observed were density, water content, ash content, vapour content, bound carbon content and heating value. The result of palm oil midrib and coconut midrib shells had a significant effect on density, water content, ash content, vapour content, bound carbon content and heating value. Based on the results of the analysis, the best treatment in this study were KSK4 of palm oil midrib and coconut midrib (25:75) with a density of 0,58 g/cm3, water content 5,82%, ash content 5,87%, evaporating content 15,01%, bound carbon content 79,12%, and heating value content 6596,65 cal/g.

Pengaruh penambahan tepung sortgum dan bit root terhadap karakteristik flake

One of the potential dry land food plants developed in Indonesia is sorghum. Sorghum is a kind of grass crop and is still a family with rice, corn and wheat. The carbohydrate content in the seeds is quite high, so it can be consumed as staple food, along with the development of many innovations that are done to make this plant to be better known and in the community's favor, one of the processed sorghum is Flakes, Sorghum Flakes is a processed food based on sorghum with the addition of beetroot root, sugar, salt and water. This study aims to determine the effect of the addition of sorghum flour (30 gr, 60 gr, 90 gr) and beetroot flour (5 gr, 10gr, 15 gr) to the characteristics of Flakes, Organoleptic parameters were analyzed statistically using the Fridmen test while to find out the best treatment in the test Organoleptic tests were carried out on the effectiveness index test, the experimental design used the Completely Randomized Design (CRD) method with 2 factors and 3 repetitions. The best treatment is determined by the effectiveness index test with the calculation results show the best treatment is on S2B2 with a formulation of 60gr sorghum flour and 10gr beetroot flour

GROWTH ANALYSIS OF THREE AQUATIC COMMODITIES CULTIVATED WITH POLYCULTURE SYSTEMS AT DIFFERENT DENSITIES

Vanamei shrimp and milkfish (Chanos chanos) are now being cultivated in ponds using a polyculture system that is maintained simultaneously in one container. The development of cultivation technology shows that seaweed can be cultivated along with shrimp and milkfish in ponds. With the addition of seaweed is expected to increase production and improve the environmental conditions of cultivation. This polycultural cultivation system can increase the efficiency of land use can also increase the productivity of ponds. This research was conducted in the pond of Glagah Lamongan village for 42 days. This study used milkfish, shrimp vaname and seaweed Gracilaria verrucosa. The research method uses Complete RandomIzed Design (RAL) method with 3 treatments and 3 repeats so that it gets 9 experimental units, the data in the analysis using ANOVA is conducted tukey further tests. Treatment A (density of milkfish and shrimp 10 tails/m2, seaweed 250g/m2), treatment B (density of milkfish and shrimp 20 tails/m2, seaweed 500g/m2), treatment C (density of milkfish and shrimp 30 tails/m2, seaweed 1000g/m2). Variables taken are Absolute Length of milkfish, shrimp vaname and seaweed. The results obtained the absolute length of milkfish, shrimp vaname and seaweed highest in treatment A (7.67 ± 0.54a). Water quality during maintenance, temperature ranges from 29.2 – 32.8oC; DO 1.1-3.4mg/l; Salinity 1-3ppt; brightness range 24 – 50 cm and ground redox obtain a range value of -42-(-328)mV.

PEFORMA PERTUMBUHAN IKAN KAKAP PUTIH (Lates calcarifer) PADA FASE PEMBESARAN YANG DIBERI PAKAN DENGAN PENAMBAHAN LISIN BERBEDA

This study aims to determine the best dose of the amino acid lysine in formulated feed for the growth of white snapper (Lates calcarifer) in the enlargement phase. The research design used three treatments and three replications with a completely randomized design method (CRD), namely control feed formulations with the addition of 0% lysine, P1 formulated feed with the addition of 0.2% lysine, and P2 feed formulations with 0.4% lysine. The test fish used was white snapper with an average weight of 90 grams. Fish reared in fiber tub volume of 2 m3 with the stocking 6 animals/m3. The results showed that feeding P2 formulation had a significant effect on growth in absolute weight, absolute length, daily growth rate, FCR, protein retention but had no significant effect on the survival rate and amino acid lysine retention. P2 feed (formulated feed with 0.4% lysine) can be used to support the growth of white snapper.

Effect of Eco Enzymes Dilution on the Growth of Turi Plant (Sesbania grandiflora)

Eco Enzymes (EE) is one of the products of fermentation that comes from fruits and vegetables wastes. Enzymes and organic acid in Eco Enzymes has a positif effect on plant growth. This study aims to investigate dilution of Eco Enzymes and its application to improve the growth of Turi plants. This research used the completely randomized design method (CRD). The treatments consisted of P1 (1:300), P2 (1:200), dan P3 (1:100), and there were 5 replications. Parameters were plant height, stem diameter, number of branches, number of leaves and leaf width. The results of this research were that 1:100 dilution treatment had significant effect (p&lt;0,05) on the the parameters of plant height, stem diameter, number of leaves and leaf width. However there was no significant effect on the number of branches. The best response to Eco Enzymes was 1: 100 dilution.

Effect of cooking and freezing time on physical properties of instant germinated red rice

Red rice is more nutritious rice than white rice due to the content of low glycemic index and high fiber, which can help to reduce blood LDL concentrations. In addition, germinated red rice more nutritious than non-germinated rice because it contains more fiber, essential amino acids, vitamins, and antioxidants. However, this rice has a hard texture, so it requires a long cooking time. Instantization process of rice is one technique to accelerate the cooking process. Instant rice, or called quick-cooking rice, is processed rice that has been cooked and dried so that it can be stored for a long time but can be served at a faster time. The purpose of this research was to analyze the effect of cooking and freezing time on the physical properties of instant germinated red rice. The method used in this research divided into two stages: first, determining the best condition to make instant germinated red rice. The second was to analyze the physical properties of instant germinated red rice. Statistical analysis of this study used a complete randomized design method with two replications. The result showed that 10 minutes of cooking time and 48 hours freezing time was the best treatment based on a physical test of instant germinated red rice.

Effect of temperature and relative humidity on chemical analysis of red rice germination

Germinated rice (GR) is known as nutritional rice due to the higher content of nutrients compared to the conventional brown rice, such as antioxidant i.e. gamma-amirobutyric acid (GABA), gamma-oryzanol, phenolic, and essential amino acid (lysine and niacine), 3 times vitamin B1 and B2, some minerals, and 4 times the dietary fiber. Generally, GR is made from germinated rice. However, in this research, the GR was made from germinated grain. The purpose of this study was to analyze the chemical properties (protein, carbohydrate, ash, fat, minerals (Fe, Mg, Mn), vitamins (B1, B2, B6), and antioxidant activity of GR which that germinated in various temperature and relative humidity (RH) condition. The method used in this research divided into two stages: first, determining the fastest germination time of temperature (room, 20 °C, and 30 °C) and RH (room, 70, 80, and 90%) treatments. The second, determining the effect of the best treatment on the chemical analysis germinating red rice. This study used a complete randomized design method with two replications. The results showed that temperature and RH influenced the chemical analysis of red rice germinated by increasing vitamin B6, ash content, carbohydrate content (room and 20 °C, 90% RH treatments), and fat content (30 °C, 90% RH treatment). But decreasing the protein, vitamin B1, and some minerals such as Fe, Mg and Mn compared to non-germinated red rice. In addition, all treatments had strong antioxidant activity.

Effect of Fermented Kangkong Seed (Ipomoea reptans Poir.) on Characteristics and Histology of Female Quail Reproductive Organs

Quail has a high reproductive ability, which can reach 3 to 4 generations a year. The quail also have high eggs productivity and capable of producing 250-300 eggs/quail/year. Egg production is closely related to the reproductive system and feed. It is necessary to know the effect of feeding fermented kangkong on the characteristics and histology of the quail reproductive organs. The increase in livestock population should be balanced with an increase in the availability of feed. Kangkong seeds waste (Ipomoea reptans Poir.) is rejected seeds from seed factories that have the potential to become alternative feed ingredients because it contains about 13.46% protein. The purpose of this study was to determine the effect of fermented kangkong seed feed (Bikafer) on the characteristics of reproductive tract organs and histology of quail oviducts because feeds affect the development of the reproductive tract and quail egg production. This study used a completely randomized design method (CRD) with 5 treatments and 4 replications. The treatments were as follows: R0 = commercial feed, R1 = 0% (Bikafer), R2 = 7.5% (Bikafer), R3 = 15% (Bikafer) ,R4 = 22.5% (Bikafer). Data were analyzed using one-way ANOVA with a significance level of 95% (α = 0.05) and the Kruskal-Wallis test, while histological observations were described descriptively. The results showed that there were significant differences in the characteristics of the uterus, vaginal length, and isthmus weights. The histology of the quail reproductive tract developed well and showed the tunica mucosal tissue, serous tunica, muscular tunica, goblet cells, epithelium, and tubular gland cells.

Evaluation of Mono-Diacyl Glycerol (MDAG) purification process to increase product yield

Monodiacyl glycerol (MDAG) was successfully synthesized by esterification of palm fatty acid distillate (PFAD) and glycerol with acid catalyst. MDAG products with mono and diacyl glycerol content > 90% were obtained after purification through solvent extraction and crystallization at low temperature. However, the yield of purified MDAG products was only around 16.23% so it was not economically feasible. The aim of this study was to evaluate effect of the hydrolysis process before the esterification process and got the best conditions of solvent extraction in the MDAG purification, to improve yields of purified MDAG. The hydrolysis process was done on PFAD (or PFAD activation) to break down the remaining triglyceride and maximize the presence of free fatty acid that can react with glycerol. Evaluation of solvent extraction process included determination of crude MDAG and hexane ratio (1:10, 1:8, 1:4), determination of ethanol to water volume ratio (1:0, 1:0.5, 1:1, 0.5:1) with various immersion duration (24, 48, 72 h). The data analysis was done with a description method and completely randomized design method (CRD) with a significance level of 5% (P <0.05 %). The activation of PFAD was carried out by reacting PFAD with water at ratio of 1:6 (w/v). This process used para-toluene sulfonic acid (pTSA) as a catalyst, which added as much as 1.2% of the weight of PFAD. The hydrolysis process was done for one hour at 110 °C. From esterification using pre-treated PFAD obtained crude MDAG with FFA content of 4.69%, yield of purified MDAG of 24.7% with no FFA was detected. The best MDAG to hexane ratio was 1:10 which has a yield of purified MDAG of 19.30% and 0% FFA content. While the best ethanol to water volume ratio was 1:0.5 with immersion time for 24 h, where the yield of purified MDAG was 27.78%.

Utilization of Compost as ameliorant in a Nickel post mining soil

Southeast Sulawesi is one of the nickel producing regions. Nickel mining activities in addition to positive impacts can also have negative impacts such as decrease of soil and increased of accumulation of heavy metals in the soil. Therefore, couple solutions are needed to improve the quality of nickel mining soil, one of those is by providing soil amendments. The material that used in this research is compost. Compost fertilizer contains humic acid which has cation exchange ability so that it can be useful for remediating the nickel post-mining area. The research used a complete randomized design method by variating the ratio of compost to nickel post-mining soil. The method steps consisting of (1) Analysis of post-mining soil sample (2) Analysis of compost-mixed mining soil sample. The results showed that the best treatment was the 17% addition of compost to nickel post-mining sample which characterized by changes in soil characteristics, such as pH value 6.68 to 7.17 (neutral) ; C-organic content 2.01% to 3.69% (high); N-total 0.19% to 0.21% (moderate); P2O5 21.77 mg /100g to 25.03 mg/100g (moderate); K2O 15.13 to 17.77 (low); and nickel content of 1194.66 ppm to 988.86 ppm. Despite a decrease of nickel content in the soil, its level is still hazardous in term of human health.