SP-36 Fertilizer Research Articles

PENGARUH SP-36 DAN ASAM HUMAT TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN KEDELAI ( Glycine max L)

Soybean is a food crop commodity that is needed by the Indonesian population because it is a source of vegetable protein, fat, vitamins, and minerals. To increase soybean production one of the things that needs to be done is the addition of phosphorus to increase the density of soybean seeds. The purpose of this study was to determine the effect of interactions between the administration of SP36 fertilizer doses and humic acid doses on the growth and production of soybean (Glycine max L) Dega 1 variety. Plosoklaten, Kediri Regency, with a height of 105 meters above sea level, with sandy loam soil type with soil pH 5. The study used factorial randomized block design (RBD) consisting of two factors, repeated 3 times. Parameters observed were Plant dried weight, plant growth rate, number of pods/plants, the weight of Seeds per plot, yield, observation data were analyzed using analysis of variance (F test). The results of the analysis of the real variance were continued with the Significant Difference test at a 5% significance level to find out the difference between treatments. The first factor is SP36 fertilizer and the second factor is humic acid. Based on the results of research that has been done, there was an interaction between the administration of SP36 fertilizer and humic acid in the parameters of plant dry weight at the age of 14 and 21, number of pods, seed weight per plot and yield., Giving fertilizer SP36 200 kg /ha with humic acid 50kg / ha can increase crop production by 43% compared to without SP36 and without humic acid.

ANALISIS KOMPETITIF DAN TINGKAT EFISIENSI EKONOMI PADA USAHATANI UBI KAYU

The purpose of the study was to determine the income of cassava farmers, the most influential production factors on cassava production, and the economic efficiency of cassava farming in Marga Tiga District, East Lampung Regency. The total population of 1 . 250 people who were taken using the Slovin formula, obtained a sample of 95 people using the Purposive Sampling method. The types of data are primary data and secondary data. Data analysis uses income analysis, multiple linear regression, and economic efficiency. The results of the study were 1) the income of cassava farmers was Rp. 7 . 422 . 769/ha, 2) the production factors of urea fertilizer, NPK fertilizer, SP3 fertilizer, ZA fertilizer and herbicides affected the production of cassava, and 3) the production factors of urea fertilizer, NPK fertilizer, SP36 fertilizer, ZA fertilizer and herbicide are not economically efficient, while the production factor of organic fertilizer is economically inefficient.

Effect of sago palm waste compost and SP-36 fertilizer against fractionation of P on Ultisols

Ultisol is a marginal type of soil that is acidic, which is mostly cultivated for agricultural areas. Nevertheless this type of soil has many obstacles, especially from the chemical and physical properties of the soil. Some of the chemical constraints faced in the use of Ultisol soil include: low soil pH (acidic soil reaction), nutrient content especially low P nutrients and high interchangeable Al concentrations. High interchangeable Al can bind P to form Al-P (Strengit) compounds so that the P concentration in the soil solution is reduced and consequently plants lack P, besides that high metal content can poison / cause toxicity to plants so that plant growth becomes unfavorable. One effort to increase P soil solution and reduce P stability is the application of P fertilizer, but it must be accompanied by organic matter. Giving organic material to acid soils can produce organic acids that are capable of chelating Al metal so that P will be released from soil solubility and available in soil solution. The research was conducted in the laboratory analysis of soil, water and plants, as well as greenhouse Faperta Unpatti Ambon, which lasted from March - November, 2011. This study used a complete randomized design with 2 factors factorial pattern consisting of the first factor is the maturity of Sago pith Waste compost and the second factor is the phosphate fertilizer (SP-36). Other research results indicate that administration of sago pith waste Compost can independently reduce Fe-P compounds. Granting SP-36 can independently reduce Fe-P compounds. Provision of compost ell sago together with SP-36 can increase the Ca-P compounds from 17.87 to 38.53 ppm, and Al-P compounds decrease from 35.00 to 16.67 ppm.

Impact of Increase in Input And Output Prices Toward Rice Production In Banten Province-Indonesia

In year 2014 the production of rice in Banten amounted to 2,045,883 tons with a harvested area of ​​386,398 ha. The objective of this study are: 1) to know the factors of influencing rice production in Banten Province, 2) to know the impact of price increase of input and output on paddy production in Banten Province. This method of study used survey method with 120 respondents. The analysis method uses Simultaneous Equations Model which was estimated using Two Stages Least Squares (2SLS) method. The results of the study were 1) The factors that affect rice production in Banten Province significantly are: Total Use of Certified Seeds, Total Use of SP-36 Fertilizers, Total Use of Solid Growing Substances, Total Use of Solid Pesticides, Total Use of Liquid Herbicides, Total Use of Labor Rent, Land area, and Farm Household Income per year. 2) From the simulation results  that the increase in grain prices by 20% will increase production by 4.4% and household income of 11.6%. A 20% increase in the price of Urea and NPK fertilizers could increase rice production by 2.5% and farm household income by 1.1%. So the increase of farm input prices (fertilizer and wage of tractor and labor rent) by 20% does not affect rice production and farmer's income. Keywords: simultaneous equation model, input and output prices, rice production.

Keberadaan Mikovirus Berdasarkan Deteksi Berbasis RNA pada Colletotrichum Hipovirulen

Fertilization is any effort that aims to increase the availability of nutrients needed by plants, and increase crop production. The study aimed to obtain fertilizer types, fertilizer dosages and combinations of types and dosages of fertilizers suitable for growth and yield of Crystal Guava plants. The study was conducted on October 2018 to Mei 2019 on farmer’s land, Banjarsari Kulon Village, Sumbang District, Banyumas Regency and Agronomy and Horticulture Laboratory of the Faculty of Agriculture, Jenderal Sudirman University. The experimental design used was a Randomized Completely Block Design (RCBD) with 2 factors and 3 replications. The first factor was the type of fertilizer, namely NPK, SP-36 and MKP fertilizers. The second factor was fertilizer dosage, namely 20 g / plant, 30 g / plant, 40 g / plant and 50 g / plant. Observed data were done by Analysis of Variance and if it significantly affected then DMRT (Duncan’s Multiple Range Test) was carried out at the level of 5%. The results showed that the most effective type of NPK fertilizer and dosage of 20 g / plant. The combination of NPK fertilizer with a dose of 20 g / plant was the most effective treatment for increasing the growth and yields of the Crystal Guava plant.

Pemanfaatan Macam dan Dosis Pupuk untuk Meningkatkan Pertumbuhan dan Hasil Jambu Biji Kristal (<em>Psidium Guajava</em>)

<p>Fertilization is any effort that aims to increase the availability of nutrients needed by plants, and increase crop production. The study aimed to obtain fertilizer types, fertilizer dosages and combinations of types and dosages of fertilizers suitable for growth and yield of Crystal Guava plants. The study was conducted on October 2018 to Mei 2019 on farmer’s land, Banjarsari Kulon Village, Sumbang District, Banyumas Regency and Agronomy and Horticulture Laboratory of the Faculty of Agriculture, Jenderal Sudirman University. The experimental design used was a Randomized Completely Block Design (RCBD) with 2 factors and 3 replications. The first factor was the type of fertilizer, namely NPK, SP-36 and MKP fertilizers. The second factor was fertilizer dosage, namely 20 g / plant, 30 g / plant, 40 g / plant and 50 g / plant. Observed data were done by Analysis of Variance and if it significantly affected then DMRT (Duncan’s Multiple Range Test) was carried out at the level of 5%. The results showed that the most effective type of NPK fertilizer and dosage of 20 g / plant. The combination of NPK fertilizer with a dose of 20 g / plant was the most effective treatment for increasing the growth and yields of the Crystal Guava plant.</p>

Analisis Tingkat Produktivitas Petani Padi di Kelurahan Simarimbun

This study aims to (1) know the factors that affect the productivity of wet land paddy farming in Siantar Marimbunsub-district of Kelurahan Simarimbun Regency (2) know the optimal using level of production factors in rice farming in Siantar Marimbunsub-district, Kelurahan Simarimbun regency. The analytical method used to analyze the factors that influence productivity is Multiple Linear Regression Analysis, and to determine the optimal level of use of production factors used NPM approach. Based on the result of research, it is found that (1) the use of Labor production factor (X1), Seed (X2), Urea Fertilizer (X3),Sp36 Fertilizer (X4), KCl Fertilizer (X5), Pesticide (X6) and Dummy influenced 84,42% productivity of rice paddy that shown by the coefficient of determination (R2) of 0.8442 while the remaining 15.58% influenced by other factors not described in this study. Regression results partially obtained that the use of labor production factor (X1) did not significantly affect productivity while the use of seed production factors (X2), fertilizer (X3), and pesticide (X4) had a significant effect on the productivity of wetland rice farming. (2) The use of wetland paddy production in Siantar Marimbunsub district had not been optimally seen from the result of NPM / Px was not the same as one so it is necessary to increase and decrease the use of production input. The optimal use of production factor for labor was 110 HOK, 60,24 Kg of seed, Urea fertilizer equal to 150 Kg, Sp36 fertilizer equal to 70 Kg, KCl fertilizer equal to 67 Kg and pesticide equal to 128,68 ml

The Leaching of Iron and Loss of Phosphate in Acid Sulphate Soil Due to Rice Straw and Phosphate Fertilizer Application

Low phosphorus (P) availability and high iron (Fe) concentration are the dominant characteristics of acid sulphate soils (ASS). Optimum agricultural management practices are required to leach the excess Fe2+ and to prevent or minimize loss of P from the soil in order to obtain conditions favorable for rice growth. The aim of this experiment was to study the effect of organic matter (OM) application in the form of rice straw (RS) on leaching of Fe and loss of P in an acid sulphate soil. The experiment was conducted in the glasshouse consisting of three treatment factors utilizing the completely randomized design with three replications. The first factor was soil condition consisting of continuous application of RS and without RS during the past five years. The second factor was application of fresh RS consisting of fresh RS application and without fresh RS application, whereas the third factor was P application consisting of three rates of SP-36 fertilizer (0.5, 1.0 and 1.5 times of the recommended rate). The results showed that RS application was effective in preventing P loss from the soil at 6 weeks after planting (WAP) and decreased the pH of leachate at all observations time but it increased Fe2+ concentration in leachate (0.07-0.42% Fe2+ in the soil were leached or 2-5 folds higher than without RS application).

Effect of Fertilizer SP-36 and Green Tonic Fertliser Aplication on the Growth and Yield of Been Plant (Phaseolus vulgaris L) Perkasa Variety

The aim of this research is to know effect of SP-36 fertilizer and liquid green tonic fertilizer on the growth and yield of green been plants. The study was conducted from February 2017 until May 2017. The located of the recearch at Barong Tongkok Village, Subdistrict, Kutai Barat Recency. The receach design used Completely Randomized Design (RAL) in experimental factorial pattern 4 x 4 with 3 replications. Factor I : dosage of SP-36 fertilizer (P), consisting of 4 levels, namely : No SP-36 aplication or control (p0), SP-36 4 g /polibag (p1), SP-36 6 g/polibag (p2), and SP-36 8 g/polibag (p3). Factor II : Concentration of Green Tonic Fertilizer (G), consisting of 4 levels, namely : No green tonic fertilizer or control (g0), green tonic 2 ml / polibag (g1), green tonic 4 ml/polibag(g2) , and green tonic 6 ml/ polibag (g3).The result showed that SP-36 fertilizer treatment had no signfiicant effect on the plant length at 10, 20, and 30 days after planting, age of flower emerged, long of fruit , ammount of fruit, and fruit weight per crop.The treatment of green tonic fertilizer had no significant effect on the plant length at 10, 20, and 30 days after planting, age of flower emerged, length of fruit , number of fruit, and fruit weight per crop.The interaction treatment had no significant effect on the plant length at 10, 20, and 30 days after planting, age of flower emerged, long of fruit , ammount of fruit, and fruit weight per crop.

Effect of Urea and SP-36 on the Growth of Grafted Rubber Seedling (Hevea brasiliensis Muell.Arg.) Clone PB 260

The aim of research to determine the effect of urea and SP-36 fertilizer as well as their interaction on the graftedrubber seedling growth, and to find appropriate doses of urea and SP-36 fertilizers for better growth of grafted rubber seedlings.The research was conducted from February 2015 until May 2015 in the village of Empas, Sub District of Melak, West Kutai Regency, East Kalimantan Province.The study design used was completely randomized design (CRD) in a factorial 4 x 4, and repeat 3 times, which comprises two factors research. The first factor was Urea (N), consisted of four levels, namely: no urea application or control (n0), 2,5g/polybag (n1), 5g/polybag (n2), and 7,5g/polybag (n3). The second factor was SP-36 fertilizer (P), consisting of 4 levels, namely: no SP-36 fertilizers application or control (p0), 2,5g/polybag (p1), 5g/polybag (p2), and 7,5g/polybag (p3).The results showed that the treatment of urea (N) affects highly significant on the plant height at ages of 2, 3 and 4 months after grafting, number of leaf at 4 months after grafting and stem diameter at 3 and 4 months after grafting. It affected significantly on the number of leaf at 3 months after grafting. But it did not affect significantly on the number of leaf at 2 months after grafting, and stem diameter at 2 months after grafting.SP-36 fertilizer treatments (P) affected very significantlyon the stem diameter at 3 and 4 months after grafting. It affected significantly on the plant height at 4 months after grafting. But it did not affect significantly on the seedling height at 2 and 3 months after grafting, number of leaves at 2, 3 and 4 months after grafting, and stem diameter at 2 months after grafting.The interaction treatment (NXP) affected significantly on the stem diameter at 4 months after grafting. But it did not affect significantly on the seedling height at 2, 3 and 4 months after grafting, number of leaves at 2, 3 and 4 months after grafting, and stem diameter at 2 and 3 months after grafting

Aplikasi Pemupukan Terhadap Pertumbuhan Tanaman Aren Genjah (Arenga pinnata) dan Tanaman Kakao (Theobroma cacao) Pada Penanaman Sistem Jalur

Planting with a lane system in palm sugar and cacao plants is a technique of plantation cultivation that aims at soil conservation and microenvironment. Plant cultivation in the field needs to get a supply of fertilizer to increase crop productivity. This study aims to determine the effect of giving SP-36 and KCl fertilizer to the best growth of sugar palm and cacao plants in the planting of path systems. The research was conducted on land in Badak Mekar Village, Muara Badak District, Kutai Kartanegara Regency, East Kalimantan. The research method used a Randomized Block Design (RBD) and repeated 4 times. Factorial experiments consisted of 2 factors, as the first factor was SP-36 fertilizer (p) consisting of 3 levels: p0 = 0 kg plant-1 (control); p1 = 0.25 kg of plant-1; p2 = 0.5 kg of plant-1. The second factor was KCl (k) fertilizer consisting of 3 levels: k0 = 0 kg plant-1 (control); k1 = 0.25 kg of plant-1; k2 = 0.5 kg of plant-1. The variables observed included: (1) Arenaceous plants: increase in caudal circumference, increase in the fifth midrib length, increase in the number of midribs, increase in number of leaflets on the fifth midrib and (2) Cocoa plants: increase in plant height, increase in stem circumference, the number of cocoa fruits, the intensity of pest and disease attacks on cocoa fruit. Observations on each variable were carried out at 3 and 6 months after treatment (mat). Data were analyzed by variance and if there were significant differences, it was followed by the Smallest Significant Difference Test (LSD) at the level of 5%. The results of the SP-36 fertilizer treatment showed very significant differences in all observation variables in early maturing palm trees and aged 3 bsp and 6 bsp cacao plants. The treatment of SP-36 fertilizer at a dose of 0.5 kg plant-1 (p2) gave the best growth of early maturing sugar palm plant 6 in the increase of the fifth midrib length, increase in bulb circumference, increase the number of midribs and increase the number of leaflets on the fifth midrib - each 137.17 cm, 25.58 cm, 3.25 strands and 39.08 strands. Likewise in the age of 6 bsp cocoa plants SP-36 fertilizer with a dose of 0.5 kg plant-1 (p2) gave the best growth in plant height increase, increase in stem circumference and number of cocoa fruit, each 18.92 cm, 8.25 cm and 25.25 pieces. The treatment of KCl fertilizer and the interaction between SP-36 and KCl fertilizers showed no significant difference in all observation variables in early maturing and cacao plants. Observations of pest and disease attacks on cocoa fruit with the intensity of pest attacks 0.00-23.47% were included in the category of minor damage and the intensity of disease attacks 0.00-66.30% which fall into the category of moderate damage.

PERTUMBUHAN KULTUR TUNAS AKSILAR KENTANG (Solanum tuberosum L.) DENGAN PENAMBAHAN SUPER FOSFAT DAN KNO3 PADA MEDIA AB MIX SECARA IN VITRO

Murashige&Skoog-based medium Potatoes are one commodity that has the potential to be developed as a resource in the context of food diversification, farmers' income riser, non fossil export commodities and raw materials for processing industry. The objective of this research was to find out the effect of SP-36 fertilizer, KNO3 fertilizer, as well as the interaction between the two fertilizers on the growth of potato nodal culture on AB Mix media in vitro. The results of this study are expected to provide economical potato tissue culture media development. This research used factorial complete randomized design. The treatment were SP-36 concentration: 0 ppm; 50 ppm; 100 ppm; and 200 ppm, in combination with KNO3 concentration: 0 ppm; 100 ppm; 200 ppm; 400 ppm; and 600 ppm, The variables observed included number of leaves, leaf color, length of plantlets, fresh weight of plantlets and percentage of plantlets growth. Based on the results of the analysis of variance (ANOVA) F. Calculate < F. Table with the average success of plantlet growth between 87.5-100%. In addition, there are four types of leaf color produced, namely the color of yellowish green, pale green leaves, green, and dark green. Research showed that the interaction between SP-36 fertilizer and KNO3 fertilizer on AB Mix media had no significant effect on all observed variables.

Produktivitas dan Luas Lahan Minimal Petani Padi Sawah Lebak di Kabupaten Ogan Ilir

Sari et al, 2018. Productivity and an Enlarge Minimum Land Area of Paddy’s Farmers in Swamp Land of the Ogan Ilir Regency. JLSO 7(2):South Pemulutan is one of the sub-districts in Ogan Ilir Regency which has swamp paddy fields potential to be developed. Unfortunately, the use of production factors which applied by the farmers has not been maximized. Therefore, proper management by using production factors efficiently and effectively can increase productivity and maintain the sustainability of their farm. Moreover, the aims of this research were (1) to analyze the factors which affect the low productivity of the swamp paddy fields, (2) to calculate the percentage of an income of the swamp paddy fields’ farmer which can fulfill their household outcome, (3) to calculate the minimum land area of the swamp paddy fields of the farmer. The method were used in this research was survey method. The sample of the farmers which taken in this study were 30 farmers from 187 farmers which works on swamp paddy fields in Lebak Pering village. The data was gathered consist of the primary data and the secondary data. The result of this research showed (1) factors which extremely affected toward swamp paddy fields productivity in Lebak Pering village was the largest of the area, seed variety, the used of urea fertilizer, the experiences of the farmer, while those that have no effect are the used of SP-36 fertilizer, NPK fertilizer and then the pesticides. (2) The contribution of swamp paddy fields farmers’ income to farmers' consumption expenditure were 60.28%. (3) The minimum land area that suggested to be cultivated by the farmer is 1 hectare and if the farmer only relies on their swamp paddy fields farming, then the minimum land area that suggested to be raised by the farmer is 1.66 hectares.

Increasing of Production and Quality of Cherry Tomato (Solanum lycopersicum var. cerasiforme) through Used of Various Growth Medium Compositions and SP-36 Fertilizer Dosages

This study was aimed at assessing the response of cherry tomato to planting mediacomposition and SP-36 fertilizer rates. A factorial completely randomized design with two factorswas used. The first factor was planting media compositions, namely 100% soil, soil + rice huskcharcoal (1:1), soil + manure (1:1), rice husk charcoal + manure (1:1) and soil + rice huskcharcoal + manure (1:1:1). The second factor was SP-36 fertilizer rates, namely no fertilizer (0%R); 155.5 kg/ha (50% R); 311 kg/ha (100% R) and 466.5 kg/ha (150% R). The recommended rate(R) was 311 kg/ha. Results showed that cherry tomato plants grown in planting medium of soil +manure significantly had higher plant height, number of leaves, number of fruits and total solublesolid content than plants grown in the other planting media. Administration of SP-36 fertilizer indifferent rates was not found to significantly affect the growth, production and fruit quality ofcherry tomatoes. Cherry tomato grown in planting medium of soil + rice husk charcoal + manureand fertilized with recommended rate of SP-36 fertilizer (100% R) produced the highestfruit/plant weight and saleable fruit weight.Keywords: cherry tomato, total soluble solid, saleable fruit, rice husk charcoal, manure

Phosphate Solubilizing Study on the Determination of Inoculant Dose and Composition for Biofossi Fertilizer

Phosphorus availability becomes a major problem on the productivity of soil and rice in Indonesia. Utilization of P source which has a slow release property is one of the solutions to these problems. Biofossi fertilizer is a natural phosphate organic fertilizer which is enriched with phosphate solubilizer bacteria (PSB), to improve the solubility of P and absorption by the plant so that P fertilization becomes more efficient. Experiment conducted on January 2015 at the experimental station of Agriculture Faculty-Padjadjaran University, Bandung, located in Ciparay, West Java. The aim of the experiment was to determine the PSB composition and its inoculation dose toward natural phosphate. Inoculum used was of Bacillus sp and Pseudomonas sp, which was injected to a carrier material. Through previous test results, the carrier used had a composition of 50 % peat + 28 % compost + 5 % humic acid + 2 % nutrition + 15 % rice husk. To t est the dose of PSB inoculation, experimental design of factorial randomized complete block was applied. As the first factor was P 2 O 5 content in the phosphate source, consisting of four levels as follows: (1) p 0 = without P 2 O 5 (as control) ; (2) p 1 = 22 % P 2 O 5 (163 kg ha -1 natural phosphate from Blora); (3) p 2 = 26 % P 2 O 5 (138 kg ha -1 natural phosphate from Morocco); (4) p 3 = 36 % P 2 O 5 (100 kg ha -1 SP-36 fertilizer). Second factor was the combination of dose and type of PSB inoculant, consisting of seven levels as follows: ( 1) b 0 = without inoculation of PSB (as control); (2) b 1 = Bacillus sp inoculant in the dose of 1 kg ha -1 ; (3) b 2 = Bacillus sp inoculant in the dose of 2 kg ha -1 ; (4) b 3 = Pseudomonas sp inoculant in the dose of 1 kg ha -1 ; (5) b 4 = Pseudomonas sp inoculant in the dose of 2 kg ha -1 ; (6) b 5 = Bacillus sp + Pseudomonas sp consortium in the dose of 1 kg ha -1 ; (7) b 6 = Bacillus sp + Pseudomonas sp consortium in the dose of 2 kg ha -1 . By using the 32 P radioisotope techniques it was known that a consortium of bacteria Bacillus sp + Pseudomonas sp was capable of dissolving P on the treatment p 0 , as well as in the treatments p 1 , p 2 and p 3 . In this treatment, some of the highest response was obtained, i.e. the grain dry weight, P uptake and P fertilizer efficiency.

Changes in some chemical properties of inceptisol soil and growth of maize (Zea mays L.) due to durian skin compost and SP36 fertilizer

Inceptisol is a widely enough soil and has many obstacles to use as agricultural field, some of the constraints are; Low level of the organic content, soil acidity, high level of Al saturation and low CEC hance this land cause a lower productivity. increasing its productivity by giving organic material compost which is durian skin compost and SP36 fertilizer.This research is aimed to know the change of some chemical properties of Inceptisol soil and growth of corn plant (Zea mays L.) due to composting of durian skin and SP36 fertilizer. This study was conducted by using Randomized Block Design (RBDs) method with two replications consisting of thirty two treatments. The treatments divided in two addition fertilizer durian skin compost (B) and SP36 (P) fertilizer consisting of; 0 g / polybag (B0), 12.5 g / polybag (B1), 25 g / polybag (B2), 37.5 g / polybag (B3), 0 g / polybag (P0), 0,25 g / polybag (P1), 0,50 g / polybag (P2), 0.75 g / polybag (P3), and their interactions. The results showed that durian skin compost significantly affected the carbon content on soil, and SP36 fertilizer had significant effect on soil P level, and both interaction had significant effect on the height of plant.

RESPON TANAMAN SAWI HIJAU (Brassica juncea L.) TERHADAP PEMBERIAN PUPUK ORGANIK DAN ANORGANIK DI KELURAHAN RURUKAN KECAMATAN TOMOHON TIMUR

ABSTRACT This study aims to determine the effect of which combination of fertilizer doses is best for the growth of Mustard Plant (Brassica juncea L.). And the research was conducted in Kelurahan Rurukan Tomohon Timur Subdistrict Tomohon City. Soil analysis was conducted in Soil Chemistry and Soil Fertility Department of Soil Agricultural Faculty of Sam Ratulangi University of Manado.This study used a Completely Randomized Design (RAL) consisting of 7 treatment combinations and repeated as many as 4 (four) times to obtain 28 pot experiments. Each pot of the experiment contains 5 kg of soil.The results showed that soil mixture with various combinations of fertilizers had a significant effect on the height of the green mustard plant, the number of leaves of green mustard greens, and the fresh weight of the green mustard plant.The best combination of soil mixture with Urea, Sp36, and Compost fertilizer is 0.5 gram / pot Urea, 0.375 gram / pot Sp36, and 50 gram / pot compost.Keywords: urea fertilizer, Sp36 fertilizer, compost fertilizer

Stabilitas Agregat Tanah, Populasi Jamur Pelarut P dan Hasil Jagung yang Dipengaruhi oleh Pupuk Hayati Mikroba Pelarut P dan Pupuk P pada Ultisols

Ultisols is a soil order with low available P. Phosphate Solubilizing Microbes is a group of microorganisms that has the ability to release P for plants. The aim of this experiment was to determine effect of phosphate solubilizing microbes and P fertilizer on soil aggregate stability, PSF population and yield of maize (Zea mays L.) on Ultisols. This research was conducted from May 2016 to August 2016 at Ciparanje, Faculty of Agriculture, Universitas Padjadjaran. This research was arranged in Randomized Block Design (RBD), consisted of 9 treatments with 3 replications. The treatments were 100 kg ha-1 of SP-36 fertilizer, 50 kg ha-1 of biofertilizer, as well as combination of SP-36 fertilizer (50% and 100%) with the dose of biofertilizer (50%, 100% and 150%). This experiment showed that the combination of biofertilizer and P fertilizer gave significant effect on the population of PSF and yield of maize, but not for stability of soil aggregates. The application of SP-36 50 kg ha-1 and 50 kg ha-1 PSM combination gave higher population of PSF and yield of maize.Keywords: Biofertilizer, maize, phosphate- solubizing fungi, aggregate stability, Ultisols

The effect of distribution supply fertilizer on rice production improvement in Gorontalo City

The purposes of this research are to: 1) analyze the distribution of subsidized fertilizer in Gorontalo City, 2) analyze the distribution of subsidized fertilizers partially (right price, right amount, and time) to increase rice production in Gorontalo City. The study conducted in Gorontalo City with a sample number of 95 farmers. The research method used is survey method. Data analysis used is multiple linear regression analysis. The results showed that there are two distributors fertilizer in Gorontalo City is PT. Indonesian Trade Company (PT PPI) and Indonesian Trade Cooperative (KPI), and 5 authorized retailers which are distributing subsidized fertilizer is Kios Tani Lestari, Anugerah Tani Kios, Saprodi Tani Kios, Cahaya Tani Kios and Bunga Tani Kios. PT. PPI is responsible for distributing NPK, SP36 and ZA fertilizers while KPI is responsible for the distribution of Urea fertilizer. Distribution of subsidized fertilizer on rice farming simultaneously have a positive and real effect on increasing rice production, while partially that have positive and real influence that is Right price, Right amount and time to increase rice production

Ketersediaan Fosfat, Serapan Fosfat, Dan Hasil Tanaman Jagung (Zea mays L.) Akibat Pemberian Kompos Granul Ela Sagu Dengan Pupuk Fosfat Pada Inceptisols

Inceptisol is a young and newly developed soil so it needs to be optimized for crop cultivation. The aim of this research is to know the availability of soil P, P uptake and corn yield after application of granular composting of sago waste (KGES) together with phosphate fertilizer to Inceptisols soil. The experimental treatment was KGES which consisted of three levels: without KGES, 40 tons KGES ha-1, and 80 tons KGES ha-1, and the use of SP-36 (P) fertilizer consisting of three levels: without P fertilizer, 120 kg P ha-1, and 240 kg P ha-1. The experiment used a complete randomized design with 3 replications. The result of the experiment was analyzed variance and relationship test using interlaced analysis. The results showed that KGES together with phosphate fertilizers could increase soil pH causing phosphate to be available and plant roots could absorb nutrient phosphate well, so that the yield of corn kiln dry weight also increased. The highest yield of dry weight of grains (7.85 tons per ha) was obtained from a combination of 80 tons of KGES ha-1 and 240 kg P ha-1.Keyword: Keywords: Ella Sago, Inseptisols, maize, phosphate