SP-36 Fertilizer Research Articles

Production of Siam Mutiara Rice in Batu Merah Village, Lampihong District, Balangan Regency

Rice (Oryza sativa L.) is an important food crop because it produces rice which is a staple food source, as in Indonesia rice is the main commodity in supporting people's food. One of the causes of rice production is the application of fertilizer, the application of fertilizer by farmers in the study area is still general in nature due to limited knowledge of data. This study aims to determine rice production due to the use of inorganic fertilizers in Batu Merah Village, Lampihong District, Balangan Regency. The method used in this research is descriptive quantitative. Data collection on rice production by way of surveys and questionnaires to 10 respondent farmers in the field, to determine the yield of rice production in 10 paddy fields with an average area of ​​study area, around (± 9.7 ha) or 9,798 m2. The farmers used inorganic fertilizers twice, before planting with a dose of 75 kg/ha of urea, 30 kg/ha of SP-36, and 30 kg/ha of NPK fertilizer. The second fertilization when the rice plants are two months old, with a dose of 50 kg/ha of urea, 20 kg/ha of SP-36 fertilizer, and 20 kg/ha of NPK fertilizer. Rice production results from the area of ​​land that has been converted, yields an average of around 2.99 t/ha. The main factor of high and low production yields is due to the different area of ​​paddy fields owned by farmers.

Efforts to increase asiaticoside content of Centella asiatica in Inceptisol Ngipiksari, Yogyakarta

Asiaticoside is an active constituent for anti-leprosy, wound healing, increasing vitality, and memory in overcoming dementia. Centella asiatica contains asiaticoside, that is widely used as a medicinal simplicia. Inceptisol Ngipiksari is a type of soil on the southern slopes of Mount Merapi which rich in weathered minerals and nutrients K, Ca, Na and Mg which are necessary for the growth and continuity of Centella asiatica cultivation. The purpose of this study was to determine the effect of SP-36 fertilizer dose and soil moisture conditions on the contents and production of asiaticoside. The experiment used a factorial Completely Randomized Block Design with 3 replications. The factors tested were the dose of SP-36 fertilizer (4 levels: 0, 75, 150 and 225 kg SP-36 ha−1), and soil moisture conditions (2 levels: 50% of field capacity conditions and field capacity conditions). The results showed that the soil CEC significantly positively correlated with asiaticoside contents. The number of leaves, secondary vines, tillers, fresh and dry shoots weight, fresh and dry root weight, available P after fertilization, P absorption by plant, and asiaticoside contents were significantly positively correlated with the asiaticoside production with a moderate to very strong relationship. Watering at field capacity can increase asiaticoside production as 276.6%. The application of SP-36 fertilizer was able to increase asiaticoside contents as 39.1–101.6%. This shows that SP-36 fertilization can increase the asiaticoside content, and control of soil moisture at field capacity can increase the asiaticoside production of Centella asiatica as medicinal simplicia.

Physiological Response, Growth, and Yield of Edamame Soybean (Glycine Max L. Merr.) Under Foliar Application of Nano Cattle Bone Ash in Entisol

Nano cattle bone ash can reduce requirement for SP-36 and increase pod yield. This study aimed to examine the physiological response, growth, and yield of edamame soybean in entisol of concentration and frequency of foliar application of nano cattle bone ash and SP-36 fertilizer.The research was conducted an experimental method which arranged in a Randomized Completely Block Design (RCBD) which consists of factor concentration (0.15, 0.30, and 0.45%) and frequency (2, 3, and 4 times). In control treatment was given 100% recommended dose SP-36, whereas between concentration and frequency foliar were given 50%. The findings demonstrated that foliar application of nano cattle bone ash with 50% SP-36 resulted in higher leaf dry weight and pod yield per plant as compared to control, increasing pod production per plant by 21.7%. The results of this study concluded that nano cattle bone ash can replace a half dose of SP-36 and increase pod yield. In the future, it is expected that the use of nano cattle bone ash can be applied into soybean cultivation and reduce use of SP-36 fertilizer.

Pertumbuhan dan Hasil Tanaman Kakao (Theobroma cacao L.) Terhadap Pemupukan Pada Lahan Tropika Basah

The purpose of this research was to determine the growth and yield of cocoa plants on fertilization on wet tropical land. The research was located on the land of Badak Mekar Village, Muara Badak District, Kutai Kartanegara Regency, East Kalimantan in 2016-2019.The research method was a randomized block design (RBD) with 4 repetitions.
 Phase I research: factorial experiment with NPK Phonska fertilizer (N) included 3 levels: n0 = 0 kg plant-1); n1 = 0.25 kg plant-1; n2 = 0.5 kg plant-1 and goat manure (k) included 3 levels: k0 = 0 kg plant-1; k1 = 2.5 kg plant-1; k2 = 5.0 kg plant-1. Phase II research: factorial experiment with SP-36 fertilizer (p) included 3 levels: p0 = 0 kg plant-1; p1 = 0.25 kg plant-1; p2 = 0.5 kg plant-1 and KCl fertilizer (k) included 3 levels: k0 = 0 kg plant-1; k1 = 0.25 kg plant-1; k2 = 0.5 kg plant-1. Phase III research: factorial experiment with SP-36 fertilizer (p) included 3 levels: p0 = 0 kg plant-1; p1 = 0.4 kg plant-1; p2 = 0.8 kg plant-1 and goat manure (k) included 3 levels: k0 = 0 kg plant-1; k1 = 7.5 kg plant-1; k2 = 15 kg plant-1. Observation variable phase I research : increase in plant height at 6 months and 18 months after treatment (bsp), increase in stem diameter at 6 and 18 bsp, increase in number of leaves at 6 months of age and yield of cocoa pods.
 Observation variable phase II research: plant height increase at 3 bsp and 6 bsp, stem circumference at 3 bsp and 6 bsp, yield of cocoa pods, pest and disease attack intensity on cocoa pods. Observation variable phase III research: 1) yield of cocoa pods 2) pest and disease attack intensity on cocoa pods 3) analysis of soil chemical properties: pH, C-organic, N, P, K, alkaline cations, acid cations, cation exchange capacity and base saturation, 4) analysis soil microbes.
 Data analysis with variance and if significantly different will be Tested for Least Significant Difference (LSD) at the 5% level. Analysis of soil chemical characteristics with the criteria of soil chemical properties Bogor Soil Research Center (PPT) 1983.
 The results of phase I research: the NPK Phonska fertilizer treatment was very significantly different in the height increase of plants aged 6 bsp and 18 bsp, the increase in the number of leaves aged 6 bsp. The best dose of NPK Phonska fertilization is 0.5 kg of plant-1 (n2). The results of phase II research: the SP-36 fertilizer treatment was very significantly different for all observation variables. The best dose for SP-36 fertilization is 0.5 kg plant-1 (p2). Intensity of pest attack with light damage category and intensity of disease attack with medium damage category on cocoa pods. The results of phase III research: the treatment of SP-36 fertilizer, goat manure and combination of SP-36 fertilizer and goat manure had no significant difference in yield of cocoa pod. The intensity of pest attacks included moderate damage and the intensity of disease attacks included light damage to cocoa pods. The results of the analysis of soil chemical properties were acid soil pH, moderate organic C content, high C/N ratio, low N content, low P content and high K content. The results of soil microbial analysis identified Azotobacteraceae bacteria and Trichoderma fungi.

Allocative Efficiency of Pontianak Siam Orange Farming in Sambas Regency, Indonesia

In Sambas Regency, 95% of the oranges are contributed by Siame oranges. Citrus farmers have a dilemma in that they don’t know whether or not production elements are used effectively. The purpose of this study is to identify the production and farming efficiency parameters for Siamese oranges. The study was carried out in Sambas Regency’s Tebas District, a hub for Siam production. A survey method is employed in the research. There are 100 Siam orange growers who responded, and purposeful sampling was used to collect the data. Data is handled using SPSS version 21 for the analysis of the Cobb-Douglas production function. The Marginal Value Product and the Mean Factor Production Price (Px) are compared in a factor efficiency analysis. The findings indicated that the usage of production elements, such as land, family labor, labor performed by people outside the family, the quantity of urea fertilizer, SP-36 fertilizer, NPK fertilizer, and insecticides are all ineffective. This calls for a reduction in the utilization of all production factors.

Application of inorganic fertilizer combination with various kinds of organic fertilizer in the nursery phase of white shrimp (Litopenaeus vannamei)

The purpose of this research is to determine the effect of natural feed growth on the growth and survival rate of white shrimp, specifically in relation to the usage of inorganic fertilizers in conjunction with various organic fertilizers. The experimental design consisted of four treatments, each replicated three times. The treatments included a combination of urea, SP-36, and organic fertilizer derived from superintensive shrimp pond waste (Treatment A), a combination of urea, SP-36, and petroganic (Treatment B), a combination of urea, SP-36, and chicken manure (Treatment C), and a control treatment consisting of only urea and SP-36 without any organic fertilizer (Treatment D). Urea was administered at a dosage of 5.2 grams per container, SP-36 at a dosage of 2.6 grams per container, and organic fertilizer at a dosage of 52 grams per container. The factors that were monitored included the composition of plankton, the growth of benthic algae, the growth and survival of white shrimp, and the quality of pond water. The study’s findings revealed no statistically significant difference in the growth of live feed when inorganic and organic fertilizers were combined (P>0.05). However, the survival rate of white shrimp exhibited a significant difference (P<0.05). Using a mixture of inorganic fertilizer (namely urea and sp-36) and organic fertilizer, within the context of a super-intensive shrimp pond, yielded the most favorable outcome regarding white shrimp survival rate, with a recorded percentage of 94.67%.

Analysis of Factors Affecting the Productivity of Smallholder Tea Farming in Solok Regency, West Sumatra

This study aims to analyze the factors affecting the productivity of smallholder tea farming in Solok Regency. Sixty-five tea farmers, selected using a simple random sampling approach, were involved in this study. The study reveals that urea fertilizer, SP-36 fertilizer, insecticides, labor, plant age, and seedling varieties significantly affect tea yield at the level of α = 0.10. Farmers can increase the yield of tea farming by increasing fertilizer and labor and intensive pest and disease control. Gambung variety produces a higher yield than TRI, and the yield increases with the age of the plant.

The Economic Efficiency of Rice Farming Production Factors in Karawang Region

The population's food needs are increasing during the COVID-19 pandemic. If the pandemic lasts longer, it is feared that a food crisis will occur, because residents will scramble to stock up on food. This study aims to analyze the efficiency level of rice productivity and the determinants that affect rice productivity to face the food crisis. This study uses secondary data and primary data, obtained from interviews. The data analysis method used is the Cobb-Douglas Stochastic Frontier Production Function approach with the Maximum Likelihood Estimation (MLE) method and multiple linear regression, which is obtained using Stochastic Frontier Analysis and E-Views 8 analysis tools. Production of land area, seeds, and pesticides have a significant effect on rice production in Karawang Regency. While the use of production factors of urea fertilizer, NPK fertilizer, SP36 fertilizer and labors workdays did not have a significant effect on rice production in Karawang Regency. The level of technical efficiency in rice farming in Karawang Regency reaches 0.9607 which indicates that rice farming is technically close to efficient. The combination of the use of land area production factors, seeds, urea fertilizer, SP36 fertilizer in rice farming in Karawang Regency has not yet reached the optimal point that is economically efficient. The level of elasticity of production in rice farming in Karawang Regency reaches a value of 1.3971 so that rice production has a scale that is increasing return to scale.

The environmental adaptation to production and price risks of cayenne pepper: Learning from the Lombok Island - Indonesia

The environment in which the place of cultivation determines the level of production and income of the farm, but how the behavior of farmers in the use of technology to achieve high levels of productivity and prices of cayenne pepper is something that still is not known. This study aims to find environmental adaptation technologies that can increase the production and price of cayenne pepper in a changing environmental situation. The study used exploratory methods in three villages of the chili production centers that have different altitudes. The unit of analysis in this study is the cayenne pepper crop that was planted in 2020/2021. As respondents, 45 farmers who grow cayenne pepper were randomly chosen. The highest productivity of cayenne was found in the lowlands at 11,133 kg/ha, in the midlands at 10,277 kg/ha, and the lowest in the highlands at 9,400 kg/ha. Cayenne pepper production risk is highest in the highlands at 0.46, in middle lands at 0.42, and lowest in the lowlands at 0.34. For it is part, the price risk is classified as high in the highlands at 0.62, the middle lands at 0.61, and the lowlands at 0.60. The behavior of farmers in coping with agricultural risks is considered a risk-taker. Cayenne pepper agricultural production still has an opportunity to increase by increasing the area of farmland, labor, urea or ZA fertilizers, SP36 fertilizers, and by increasing the ability of farmers to manage agricultural risks.

Application of Biofertilizer and Two Sources P Fertilizer to N and P Uptake and Growth of Soybean (Glycine max L. Merr.) at Ultisol

The research aims to know the effect biofertilizer, two sources P fertilizer and the interaction of biofertilizer and two sources P fertilizer to N and P uptake and the growth of soybean at Ultisol. This research was conducted on the Screenhouse Faculty of Agriculture University of North Sumatera, Medan. It used Randomized Block Design with 2 treatment factors and 3 replications. The first factor was biofertilizer, consist of : without the application, 108 CFU/mL Rhizobium sp. (5 mL/plant), 108 CFU/mL Burkholderia cepacia (5 mL/plant), combination 108 CFU/mL Rhizobium sp. (5 mL/plant) and 108 CFU/mL Burkholderia cepacia (5 mL/plant). The second factor was the sources P fertilizer, consist of : without the application P, 1.8 g/plant SP-36, 2.1 g/plant RP. The results showed that application of biofertilizer significantly increased soil pH, population of phosphate bacteria, total effective root nodules, shoot dry weight and P uptake of soybean at Ultisol. The best treatment of combination Rhizobium sp. and Burkholderia cepacia. The application P fertilizer significantly increased soil pH, P available, total effective root nodules, shoot dry weight, root dry weight, N and P uptake of soybean at Ultisol. The best treatment of SP-36 1.8 g/plant. The interaction between biofertilizer and P fertilizer significantly increased P uptake of soybean at Ultisol. The best treatment of Burkholderia cepacia with SP-36 fertilizer.

MINIMIZING IDLE CAPACITY AND EFFICIENCY COST BY MODIFYING FEEDING AND FINISHING PF-I TO PRODUCE NPK

With the policy of revoking the SP-36 fertilizer subsidy in 2022, an alternative is needed to minimize idle capacity and cost efficiency caused by stopping operations at the Phosphate I Fertilizer Unit. Based on national fertilizer stock data for NPK 15-10-12 fertilizer, there is a gap between the actual stock nationally and the minimum stock. The low actual stock nationally can lead to a scarcity of NPK fertilizer which can affect national food security. So as an alternative solution to solving the problem, the Phosphate I Fertilizer Factory is utilized to be able to produce NPK fertilizer. This problem is solved by using the PDCA Cycle (Plan-Do-Check-Action) method. Based on the data and facts in the field, it is known that the existing equipment condition of the Phosphate I Fertilizer Unit has not been able to produce NPK fertilizer. The results of the project found the best solution to the problem of equipment conditions at the Phosphate Fertilizer Unit I by modifying the feeding system facility which was originally manual to weigher based by installing 3 hoppers, dozometers, BC mixing, and DAP crusher in the Curing 250 Warehouse, then installing coating facilities and coloring NPK fertilizer on the existing cooler in the Phosphate I Fertilizer Unit, making key operating parameters, and conducting an On Job Training scheme for the Phosphate I Fertilizer Unit personnel at the NPK II/III/IV Plant. So with this modification, the Phosphate Fertilizer Factory I is expected to be able to produce NPK fertilizer.

KAJIAN MEDIA TANAM DAN PEMBERIAN PUPUK P DAN K TERHADAP PERTUMBUHAN DAN HASIL TANAMAN TOMAT (Lycopersicum esculentum Mill.)

Low soil fertility rates and not yet intensive crop cultivation have an impact on the declining trend on tomato production in the eastern multiplication. Low productivity of tomatoes due to low quality of seedlings and pest and disease attacks. Efforts to increase tomato production have been carried out, among others, by improving cultivation techniques, namely by improving the physical properties of the soil by adding organic materials and adding nutrients using inorganic fertilizers. The design of this study is; Complete randomized design with factorial analysis 2 x 4 and repetition as much as 3 times. In the first factor, the media mixture consists of 2 levels, namely T0 = Soil, T1 = Mixture of soil, manure, and chaff (2:1:1). The second factor is the combination of fertilizer K and P consists of 4 stages, namely: P0 = without fertilizer, P1 = 5gram KCL and 15grams SP-36, P2 = 10 grams KCL and 15 grams SP-36; P3 = 15 grams KCL and 15 grams SP-36. The number of polybags in the study is 24 with a per polybag size of 30 x 40 cm. The results showed the addition of manure and chaff gave clear results to the growth and production of tomatoes. The application of KCl and SP-36 fertilizers affect the high growth of plants but does not affect the production of tomato plants. Recommendations for the use of organic materials and KCL fertilizers, SP-36 is applied separately

UJI APLIKASI POC KEONG MAS DAN PUPUK SP-36 TERHADAP PERTUMBUHAN SERTA P RODUKSI TANAMAN TOMAT CERI (Solanum lycopesicum var. cerasiforme)

This study aimed to determine the effect of the main and main POC of golden snail and SP-36 fertilizer on the growth and production of cherry tomatoes (Solanum lycopersicum var. cerasiforme). This research was carried out in the experimental farm of the Faculty of Agriculture, Riau Islamic University, Jalan Kaharuddin Nasution No. 113, Air Cold Village, Bukit Raya District, Pekanbaru City. This research was carried out for 5 months starting from February to June 2021. This study used a completely randomized design (CRD) with 2 factorials, the first factor was POC Keong Mas (P) and the second factor was SP-36 fertilizer (S) each consisting of 4 levels of treatment. The parameters observed were: plant height, flowering age, number of bunches planted, harvest age, the weight of fruit planted, the weight of fruit per fruit, number of fruit planted, and number of leftover fruit. The research data were analyzed statistically and continued with the BNJ test at the 5% level. The results showed that the effect of the POC of golden snail and SP-36 fertilizer had a significant effect on all observation parameters. The best treatment was giving a combination of POC of golden snail 75 ml/L of water and SP-36 fertilizer of 7.5 g/plant (P3S3). The main effect of giving golden snail POC gave a significant effect on all observation parameters. The best treatment was giving the golden snail POC 75 ml/L water (P3). The main effect of SP-36 fertilizer had a significant effect on all observation parameters. The best treatment was the application of SP-36 7.5 g/plant (S3) fertilizer.

Effects of nano guano, nano phosphate rock, and SP-36 fertilizers on maize growth and phosphorus uptake in inceptisol

Nanotechnology fertilizers are fertilizers associated with objects measuring 1 nm to 100 nm capable of controlling or manipulating at an atomic scale. Phosphorus is one of the essential nutrients needed by plants in large amounts. Maize is a strategic commodity requiring optimal nutrients. Inceptisol is soil that has relatively low fertility and chemical properties. The addition of P nutrients to the soil plays an important role in improving soil quality. This study aimed to compare the types of P fertilizers of nano guano, nano phosphate rock, and SP-36 with various doses of P2O5 and determine the most effective type. This research was arranged in a completely randomized design (CRD) with two factors. The first factor is the type of fertilizer, consisting of nano guano, nano phosphate rock, and SP-36. The second factor is the dose of P2O5 with four treatment levels, namely 0 kg.ha-1, 50 kg.ha-1, 100 kg.ha-1, and 150 kg.ha-1. The results showed that nano phosphate rock was the most effective fertilizer for maize in Inceptisol. The optimum dose of P fertilizer was 100 kg.ha-1, which was able to produce the highest plant height (215.67 cm) and phosphorus uptake (0.4765 g/plant).

THE EFFECT OF UREA, KCl, SP-36 FERTILIZER ON PRODUCTION AT SOME AGE OF NATURAL RUBBER PLANT (Hevea brasiliensis Mull.Arg)

Gebi Hiskia Anggraini, Faculty of Agriculture, Widya Gama Mahakam University Samarinda 2020, " The Effect Of Urea, Kcl, Sp-36 Fertilizer On Production At Some Age Of Natural Rubber Plant (Hevea Brasiliensis Mull.Arg)" under the guidance of Mahdalena and Akhmad Sopian.
 The purpose of this study was to determine the correct dosage of fertilizer to increase the production of natural rubber plants, to determine the effect of rubber plant age and the combination of Urea, KCl, SP-36 fertilizers on increased production,this research was conducted for 3 months, from March 2020 to July 2020. The research location was in a rubber plantation located in Tondoh Village
 The study used a divided plot design or divided plot consisting of 2 factors with 3 replications, the main plot factor was the age of the rubber plant which consisted of 2 levels of age 8 years and 10 years, the second factor of the sub-plots was Fertilizer consisting of 5 levels, namely: P0 = Without fertilizer, P1 = Urea fertilizer 350 g, KCl 300 g, SP36 260 g / tree, P2 = KCl fertilizer 300 g, SP36 260 g / tree, P3 = Urea fertilizer 350 g, SP36 260 g / tree, P4 = Urea fertilizer 350 g, KCl 300 g / tree
 The results showed that the application of Urea, KCl, SP-36 fertilizers had a significant effect on latex productivity, latex wet weight, and latex dry weight on the production of rubber (Hevea brasiliensis Muell. Agr).
 At the age of 8 years and 10 years with the combination of Urea, KCl, SP-36 Fertilizer treatment did not manifest a significant effect on the results of Production, Wet Weight, Dry Weight, and Dry Rubber Content
 Dry Rubber Content Natural rubber (Hevea brasiliensis Muell. Agr) belongs to quality II which has a low Dry Rubber content that means that the water content in the latex is relatively high
 Key words: Latex and Inorganic

The Effect o f Planting Media And Organic Fertilizer Urine Cow On Growth Pepper Seedlings ( Piper Nigrum L.) Malonan Variety 1

Research on application of solid decanter and SP 36 fertilizer on vegetative growth of palm oil seeds (Elaeis guineensis Jacq) age 1 month. The study was conducted for 12 weeks (3 months) from May - August 2021. The research was carried out in the Agrotechnology Experimental Garden at Widya Gama Mahakam University Samarinda. This research uses The research method used a Randomized Block Design (RAK) with a 4 x 4 factorial experiment consisting of 3 replications. The first factor is P0 = No Treatment (Control), P1 = 75g/polybag, P2 = 100g/polybag, P3 = 125g/polybag. While the second factor is SP-36 fertilizer with: S0 = No Treatment (Control), S1 = 1.5g/polybag, S2 = 2.5g/polybag, S3 = 3.5g/polybag. The expected output is to provide information about the best dose of solid decanter for vegetative growth of falm oil for the community. Provide information about the best SP 36 fertilizer for the vegetative growth of palm oil for the community.

Pengaruh Pemberian Pupuk Hayati dan SP-36 untuk Meningkatkan Hasil Tomat (Solanum lycopersicum L.) pada Tanah Gambut Pedalaman

This study aims to determine the effect of biological fertilizers and SP 36 on tomato yields on inland peat soils and determine the best concentration of biological fertilizers and doses of SP-36 that can increase tomato yields. This research took place at the Installation of Experimental Garden of Agriculture, Faculty of Agriculture, University of Palangka Raya. The design used in this study was a factorial Completely Randomized Design (CRD) and was repeated 3 (three) replications. The first factor was the concentration of biological fertilizers (H) which consist 4 levels: H0= 0 ml.-1; H1= 2 ml.l-1; H2= 5 ml.l-1; H3= 7 ml.l-1. The second factor was the dose of SP-36 (P) which consist 3 levels: P1=150 kg.ha-1(5,11 g.polybag-1); P2= 200 kg.ha-1 (6,81 g.polybag-1); P3=250 kg.ha-1 (8,52 g.polybag-1). The results showed that the combination of biological fertilizers and SP-36 did not interact with all observed variables. Biofertilizer dose 7 ml.l-1 showed the best result of the number of fruits were 15.67 fruits, the weight of fresh fruits were 220.16 g, and the dry weight of tomatoes root were 9.92 g. SP-36 fertilizer dose 200 kg.ha-1 showed the best result of the number of fruits were 16.42 fruits, the weight of fresh fruit of tomatoes were 232.51 g, the weight of fresh root were 26.93 g and the weight of dry root were 9.38 g.

FACTORS of PRODUCTION RICE CORPORATE FARMING MODEL in CENTRAL JAVA

The agricultural sector is still faced with various problems. Starting from the increasingly narrow land, decreased land productivity due to the use of inappropriate production factors, erratic and unpredictable climatic conditions to the issue of unique prices that fluctuate at any time. These obstacles and constraints will ultimately affect the income of farmers. The distribution of income is obtained from the production and productivity of rice farming during the growing season. Increased production can be done through the agricultural model of corporate farming. This study aims to estimate the factors that influence rice production with the corporate farming model. The research location was determined purposively in Sukoharjo Regency. Sampling by census was 51 corporate farmers. Estimated data to produce factors of production using the Cobb-Douglass production function model. The results showed that the factors that significantly affected the increase in rice production using the corporate farming model were land area and urea fertilizer. Meanwhile, the production factors of SP-36 fertilizer, NPK fertilizer, pesticides and labor did not have an effect on the increase in rice production so that these production factors could be an opportunity to improve production and productivity.

PERFORMANSI MORFOLOGI BIBIT KELAPA SAWIT (ELAEIS QUINEENSIS JACQ) DI PRE NURSEY PADA APLIKASI SP-36 DAN UREA

Background and Objective: The role of phosphorus and nitrogen is very important for the metabolism of oil palm plants in the nursery phase. This study aims to determine the morphophysiological performance of oil palm (Elaeis quineensis Jacq) seedlings in the pre-nursery due to the application of SP-36 fertilizer and urea. Materials and Methods:The research was conducted on Jln. Bunga Ncole Permai, No.30 Medan Tuntungan District with an altitude of ± 20 meters above sea level. This research is done June 2021 to August 2021. The study used a factorial Randomized Block Design with two factors. The first factor is the dose of SP-36 fertilizer with 3 levels of S1 = 5 g/polybag; S2 = 10g/polybag; S3 = 15 g/polybag. The second factor is the dose of urea fertilizer with 3 levels: U1 = 3 g/polybag, U2 = 5 g/polybag and U3 = 7 g/polybag. Results: The results showed that the dose of SP-36 fertilizer had a significant effect on stem diameter at 12 WAP, number of leaves at 8, 10 and 12 WAP, and leaf length at 10 and 12 WAP. The urea dose treatment significantly affected plant height at 6, 8, 10, and 12 WAP, stem diameter at 10 and 12 WAP, number of leaves at 6, 8, 10 and 12 WAP, and leaf length at 8, 10 and 12 WAP. The interaction between the two treatments did not have a significant effect on all ages of observation. Conclusions: the best oil palm seedling growth was found in the treatment of SP-36 S3 fertilizer dosage = 15 g/polybag and urea 7g/polybag.

Growth and Yield of Patchouli (Pogostemon Cablin Benth) in Combination of Soil Améliorant and Fertilizer SP-36

Patchouli cultivation requires a fairly high nutrient intake and requires intensive cultivation actions. Land that is still widely available for cultivation of plantation crops is marginal land, so that in patchouli cultivation it is necessary to have input in improving soil fertility. The aim of the study was to determine the effect of soil enhancer, P fertilizer (SP-36) and the interaction between soil enhancer and P fertilizer (SP-36) on the growth and yield of patchouli. The study used a completely randomized block design with a factorial pattern with two factors. First treatment of soil améliorant (100% soil); 25% soil improvement materials and 75% soil; 50% soil améliorant and 50% soil). The second factor was SP-36 fertilizer (without SP-36 fertilizer; 1.8 g SP-36; 3.6 g SP-36, and 5.4 g SP-36 per plant). Each treatment combination was repeated three times. The variables observed were plant height, shoot dry weight, root dry weight, ratio of shoot and root dry weight, and patchouli yield. The results showed that the application of soil amendments at a dose of 25% and 50% in the planting medium gave better results on plant height, crown dry weight, and root dry weight, as well as the ratio of shoot and root dry weight. The application of SP-36 fertilizer and interactions at various doses did not have an effect on plant height, shoot dry weight, and root dry weight. The highest patchouli yield was found in the combination treatment of 25% soil améliorant and 5.4 g SP-36 on planting media with a yield of 4.2%.