Organic Dosage Research Articles

The Effect of Giving Liquid Organic Fertilizer Made from Cow Urine Enriched by Agricultural Symbiotic Microbes on the Production of Taiwan Grass (Pennisetum purpureum Cv. Mott)

This research aims to determine the effect of adding liquid organic fertilizer (POC) made from cow urine and agricultural symbiotic microbes on the growth and production of Taiwan grass (Pennisetum purpureum Cv. Mott). The research location is Natai Raya Village, Kumai District, West Kotawaringin Regency. The research method used a unidirectional Randomized Block Design (RAK) with 3 fertilizer treatments applied to Taiwanese grass with 6 replication plots. Treatment consists of: P1 using chemical fertilizer (PK) 100% NPK 200 kg/ha (40 g/plant) or P2 using PK 100%+25% POC (100 ml/plant), and P3 using PK 100%+50 % POC (200 ml/plant). The parameters observed were: plant height, stem diameter, number of tillers, leaf length, fresh weight production (BS), dry matter production (DW) and organic matter production (BO). The results of the study showed that there was a significant increase (P<0.05) with the addition of POC on the growth and production of Taiwan grass. Plant height increased significantly, the highest at P3 was 91.6 cm, an increase of 32.2% compared to P1 of 69.3 cm, at P2 it increased by 16.1%. The largest stem diameter in P3 was 2.18 cm, an increase of 29.9% compared to P1 of 1.68 cm, P2 increased 13.7%. The highest number of offspring at P3 18.56 increased 45.5% compared to P1 12.75, P2 increased 24.9%. The length of the longest leaf on P3 was 77.46 cm, an increase of 40.5% compared to P1 of 55.13 cm, P2 increased 34.55%. The highest BS production was at P3 28,550 tons/ha, an increase of 22.37% compared to P1 23.33 tons/ha, P2 increased 9.74%. BK production was highest at P3 13.38 tonnes/ha, an increase of 25.6% compared to P1 10.62 tonnes/ha, P2 increased 12.5%. The highest BO production was at P3 7,208 tonnes/ha, an increase of 30.62% compared to P1 5.51 tonnes/ha, P2 increased 15.92%. The conclusion of this research is that the higher the dose of liquid organic fertilizer made from cow urine, the higher the growth and production of Taiwanese grass. The optimal fertilizer dose is 100% chemical fertilizer treatment with added liquid organic fertilizer made from 50% cow urine. Keywords : Chemical fertilizer; liquid organic fertilizer; cow urine; agricultural symbiotic microbes; growth and production; Taiwan grass

EFFECTS OF NPK AND POULTRY MANURE RATES ON GROWTH PERFORMANCE AND YIELD OF SOYBEAN (Glycine max L. Merril)

Pot experiments wereconducted in 2021at the screen house to evaluate the effect of nitrogen, phosphorus and potassium (NPK) and poultry manure (PM) rates on the growth and yield of soybean (TGx1835-10E). The treatments consisted of Nitrogen Phosphorus and Potassium (NPK 15:15:15) rates (0g, 0.6g, 1.2g and 2.4g) and Poultry Manure (PM) rates (0g, 3g, 6g and 12g) which were combined in factors to give sixteen treatment combinations and Control with neither fertilizer. The experiment was laid out in a completely randomized design and replicated six times.Soil and PM were analyzed for physico-chemical parameters using standard procedures for pH, O.C, O.M, P, N, Na, Ca, Mg, K, EC and particle size distribution. Data collected includes; growth performance at 64 days after planting (DAP) for; plant height, root length, number of leaves, number of branches, chlorophyll content, leaf area, shoot dry weight) and yield attributes (number of pods/plant, number of seeds/pod, economical yield, biological yield, harvest index) and these data were subjected to analysis of variance (ANOVA) and means were separated using Tukey. Result indicated that the combined application of PM and NPK significantly (p<0.05) increased plant height, number of leaves, number of branches, leaf area, chlorophyll content, shoot dry weight, harvest index and economic yield of soybeanthan the sole application of either PM or NPK and the control. No significant difference was however recorded for number of pods, number of seeds and biological yield. The use of balanced doses of inorganic and organic fertilizers improved growth and yield qualities of soybean.

Human feces compost as an organic fertilizer for sweet corn cultivation in volcanic soil of Mt. Merapi, Indonesia

Volcanic material sedimentation of Mt. Merapi causes changes in surface soil's physical and chemical properties that reduce soil fertility. The eruption of the mountain also builds volcanic soil layers, which are generally porous and have a low water-holding capacity. The chemical properties of this layer have low nutrient content and organic matter. Solid human feces composted for 30 days has a water content of 51.62%, carbon 15.62%, nitrogen 1.50%, and phosphorus 6.45%. The potential of nutrients possessed by human feces compost has the opportunity to be used as a source of fertilizer for plants because the plant, animal biomass, and human excreta are essential components of material and energy flow in ecosystems. However, the human feces compost as an organic fertilizer has not yet been widely utilized. Therefore, the research aims are to study the potential of sanitized human feces composts to improve the fertility of volcanic soil from Mt. Merapi Indonesia and find its optimum dosage for sweet corn cultivation. Volcanic soil from Mt Merapi was brought to the greenhouse from the mountain area and used as media to cultivate sweet corn plants. The research was conducted using a completely randomized design (CRD) with five treatments consisting of four dosages of human feces compost and one control treatment using cattle manure. The four dosages of composted human feces were applied in the volcanic soil with the dose of 5, 10, 15, and 20 tons/hectare. Organic fertilizer from cattle manure with a dose of 20 tons/hectare was used as a control. The result showed that human feces compost has similar potential as cattle manure (control treatment) in increasing the growth and yield of sweet corn. Furthermore, the result also showed that the optimum dosage of organic fertilizer from human feces compost to increase sweet corn's productivity was 15 tons per hectare. Key words: human feces, soil quality, sweet corn, organic fertilizer, Indonesia

The Effectiveness of Liquid Organic Fertilizer Banana Peel Kepok and Onion Peel to Plant Growth Ciplukan (Physalis Angulata L.)

Ciplukan (Physalis angulata L.) is a medicinal plant that grows wild in tropical climates that has many properties to cure various degenerative diseases. This plant is relatively rare because it is often considered a weed. Banana peels and shallots can be used as liquid organic fertilizer (POC). Liquid organic fertilizer has the advantage that the nutrients contained are more quickly and easily absorbed by plant roots. The purpose of this study was to determine the growth of ciplukan (Physalis angulata L.) plants through the provision of various doses of liquid organic fertilizer kepok banana peel and shallot skin and determine the best dose of liquid organic fertilizer in affecting the growth of ciplukan (Physalis angulata L.) plants. The method used in this research is an experiment consisting of independent variables, namely liquid organic fertilizer of kepok banana peel and shallot skin and the dependent variable is the growth of ciplukan plants (Physalis angulata L.). The sample used in this study was the Ciplukan plant (Physalis angulata L.). Sampling using group randomized design (RAK) technique. This experimental method uses 5 treatments and each treatment is repeated as many as 5 repetitions, thus there are 25 experimental units of ciplukan (Physalis angulata L.) plant samples with concentrations of 0 ml, 15 ml, 25 ml, 35 ml, and 45 ml with the observation parameters measured are plant height, stem diameter, number of leaves, and leaf width. The results showed that liquid organic fertilizer of kepok banana peel and shallot skin had an effect on the growth of ciplukan (Physalis angulata L.) plants. The concentration of 35 ml/polybag gives a better effect on plant height, stem diameter, and leaf width in ciplukan (Physalis angulata L.) plants compared to the control treatment and other treatments.

The Effect of Vermicomposting and NPK Fertilizer on the Growth of Bok Choy (Brassica rapa L)

One source of nutrients that influences how a plant grows and produces is fertilizer. fertilization that is possible with both inorganic and organic fertilizers. The purpose of this study is to ascertain how the development of bok choy is impacted by vermicompost, NPK fertilizer, and their combination. Design using RAL two components with five fertilization levels each, repeated three times, such that the experimental unit employed up to 75 plants. The first factor is the dose of vermicompost organic fertilizer consisting of K 0 = 0 gr (control), K1 = 50 gr, K2 = 100 gr, K3 = 150 gr and K4 = 200 gr. The second factor is the dose of NPK fertilizer (16:16:16) consisting of N 0 = 0 gr (control), N 1 = 0.3 gr, N2 = 0.6 gr, N3 = 0.9 gr and N4 = 1.2 gr. The ANOVA test was used to evaluate the data. The findings revealed that the vermicompost treatment had no appreciable impact on the plant's height, number of leaves, leaf area, wet weight, or dry weight characteristics. The use of NPK fertilizer has a sizable influence on plant properties such as height, leaf count, leaf area, wet weight, and dry weight. Vermicompost and NPK fertilizer together have a considerable influence on the metrics of plant height, leaf count, wet weight, and dry weight.

Effect of concentration of banana corm liquid organic fertilizer and dosage of bokashi fertilizer on growth and yield of long bean (Vigna sinensis L.)

This research aims to determine the effect of the concentration of corm banana liquid organic fertilizer and doses of chicken manure bokashi on the growth and yield of long bean plants. The research was conducted in Sidera Village Sigi Biromaru District, Sigi Regency, from October to December 2021. The research used a Factorial Randomized Block Design (RBD). The first factor was the concentration of banana corm liquid organic fertilizer, which consisted of four levels, namely P0 = without liquid organic fertilizer, P1 = 100 ml per L, P2 = 200 ml per L, and P3 = 300 ml per L. The second factor was the dose of bokashi chicken manure, which consisted of 3 levels, K1 = 15 tons per ha, K2 = 20 tons per ha, and K3 = 25 tons per ha. The results showed an interaction between banana corm liquid organic fertilizer and chicken manure bokashi. The treatment of banana corm liquid organic fertilizer at a concentration of 300 ml per L, and bokashi chicken manure at a dose of 25 tons per ha significantly affected plant height, number of leaves and number of pods.

PERTUMBUHAN DAN PRODUKSI KACANG TANAH (Arachis hypogaea L.) PADA BERBAGAI DOSIS KALIUM ORGANIK

Potassium is a macro nutrient needed for plant growth, especially for the formation of pods and seeds. Organic potassium sources such as coconut fiber ash can be used as an alternative to reduce the use of chemical fertilizers. Cow urine contains nitrogen nutrients which can be used as a source of N nutrients to reduce the use of urea fertilizer. This research aims to determine the dose of organic potassium, the dose of liquid organic fertilizer (LOF) from cow urine on the growth and production of peanuts. This research was structured using a Randomized Block Design (RBD) with 2 treatments, namely doses of organic potassium and cow urine liquid organic fertilizer (LOF). The parameters observed were plant height (cm), number of leaf stalks, seed weight per 1000 (gr), number of pods (seeds), fresh weight (gr), and dry weight (gr). The results of the study showed that treatment with doses of organic potassium and cow urine LOF had no significant effect on the growth and production of peanuts. The best dose of organic potassium is organic potassium equivalent to a dose of 75 kg KCl/ha. The best dose of cow urine LOF is 75 ml/l water (U2). The best combination of potassium dose equivalent to 75 Kg KCl/ha with a LOF dose of cow urine for growth and production of peanuts LOF cow urine 50 ml/l (A2U1).

Pengaruh Perlakuan Mulsa Jerami Padi dan Pupuk Organik Granul Terhadap Pertumbuhan dan Produksi Benih Kacang Hijau (Vigna radiata L.)

Mung bean is a commodity that had high potential to be developed, because it had many advantages in terms of cultivated and is also one of the most popular food ingredients in the community. This study aims to increase the growth and production of mung bean seeds by treating the doses of granulated organic fertilizer and the weight of rice straw mulch. This research was conducted in Kraton Village, Kencong Subvillage, Jember Regancy on August-October 2022. The study used factorial completely randomized design (RBD) with two factor and three replications. The first factor are the dose of granular organic fertilizer (G) consisting of 5 tons/Ha (G1), 10 tons/Ha (G2), 15 tons/Ha (G3). The second factor are the weight of straw mulch consisting of (J1) 6 tons/Ha, (J2) 9 tons/Ha, (J3) 12 tons/Ha. The data will be analyzed used ANOVA then follow up with DMRT test 5% level. The results showed that the gradulated organic fertilizer doses give the significant effect for on parameters productive branches. Treatment of rice straw mulch weight had no significant effect on all observed parameters. The interaction of granulated organic fertilizer doses and rice straw mulch weight had a highly significant effect on the parameters of plant height at 28 DAP, the number of productive branches, total of pods each plant, and had a significantly different effect on the parameter total of seeds each plant.

Pengaruh Pemberian Pupuk Kandang dan Pupuk Organik Cair Terhadap Pertumbuhan dan Hasil Kentang (Solanum tuberosum L.) Kultivar Granola

Potato (Solanum tuberosum L.) is one of the staple foods in the world. Potato productivity must be increased to comply public consumption. This study aims to determine the interaction effect of doses of chicken manure and concentration of liquid organic fertilizer on the growth and yield of potato cultivar Granola. The research was conducted from February to June 2021, in Cikole Village, Margamulya Village, Bandung Regency, West Java Province with an altitude of 1,200 m above sea level and included in the C2 agro-climatological zone based on Oldeman's classification. The experiment used a factorial randomized block design (RBD). The first factor was the dose of manure, which consisted of 3 treatment levels, namely 0, 10 and 20 tons/ha. The second factor was the concentration of liquid organic fertilizer, which consisted of 3 treatment levels, namely: 0, 2, and 4 mL/L. Each treatment was replicated 3 times. The results showed that the interaction effect between doses of manure and liquid organic fertilizer occurred on plant height at 28 days after sowing and number of tubers per plant. The single effect of manure doses or liquid organic fertilizer concentration has made a difference in the growth and yield components. A dose of 10 tons/ha of manure or a concentration of 4 mL/L of liquid organic fertilizer could increase potato yields, compared to without manure or liquid organic fertilizer.

Pengaruh Dosis Pupuk dan Tinggi Permukaan Air pada Budidaya Padi Varietas M70D dengan Media Pasir

This study aims to obtain the most suitable combination of water table level and organic fertilizer dosage for the growth and production of M70D rice varieties in sand media. The tools used include glass pots with a thickness of 5 mm, digital scales, floats, pipes, sprayers, tape measure and ruler. The materials used were rice seeds of the M70D variety, husk charcoal, soil, river sand, water, granule organic ghally fertilizer, and liquid ghally organic fertilizer. The research method used was a factorial experiment in a completely randomized design with 2 factors, namely fertilizer dose (d) and water level (a) with each treatment repeated 3 times (U). The growth of rice plants (Oryza Sativa L.) variety M70D will be optimum if given a dose of 5 g of fertilizer in the vegetative phase. Whereas in the generative phase, it will be optimum with a 15 gr fertilizer dose. A water level of -1 cm below the surface had the best effect on plant height and number of leaves of Paddy (Oryza Sativa L.) variety M70D in the vegetative phase. Whereas in the generative phase, will be optimum with the water level of 0.5 cm. The application of a fertilizer dose of 15 g and a water level of 0.5 provides the most optimal effect for the growth and development of rice variety M70D. Keyword: Fertilizer, Glass, Paddy, Potted rice, Sand media.

PENGARUH KOMPOSISI MEDIA TANAM DAN DOSIS PUPUK ORGANIK CAIR NASA TERHADAP PERTUMBUHAN DAN HASIL TANAMAN TERONG (Solanum melongena L.) VARIETAS YUVITA F1

The aim of this research is to determine the effect of the interaction between planting media composition and dosage of Nasa liquid organic fertilizer on the growth and yield of eggplant (Solanum melongena L) var. YuvitaF1. The research was carried out in Dukuh Jlimut, Plosokerep Village, Sananwetan District, Blitar City with an altitude of 150-200 in March – June 2023. The research used a 2 factorial Randomized Block Design. Factor I is the composition of the planting medium (M) which consists of 3 levels, namely M1: soil: Goat kohe fertilizer (5:1), M2: Soil: Rice husks: Goat kohe (3:2:1), M3: Soil: Cocopeat : Kohe Goat (3:2:1). Factor II is the dose of Nasa POC fertilizer (P) which consists of 4 levels, namely P1 = 0 ml/polybag (without POC fertilizer), P2: 3 ml/polybag, P3: 6 ml/polybag and P4: 9 ml/polybag . The experiment was repeated 3 times so there were 36 experimental units. The variables observed were plant height (cm), number of fruit and fruit weight at harvest (grams). The average observation results were analyzed using a variance test (α = 5%) and followed by a 5% Honestly Significant Difference Test (BNJ). The research results showed that there was a real interaction between the composition of the planting medium (M) and the Nasa POC dose (P) on the variables of plant height, number of fruit and fruit weight of eggplant plants. The best results were obtained in the M1 planting media composition treatment (soil: goat kohe with a ratio of 5:1) and a Nasa POC dose of 6 ml/polybag (M1P3) for these 3 variables.

PENGARUH KONSENTRASI DAN INTERVAL WAKTU PEMBERIAN PUPUK ORGANIK CAIR AZOLLA TERHADAP PERTUMBUHAN DAN HASIL TANAMAN PAKCOY Varietas Nauli (Brassica rapa chinensis L.)

The aim of the research was to determine whether there was a real interaction effect of Azolla POC concentration and the time interval of POC administration on the yield and growth of Pakcoy plants. The research used a Randomized Group Design (RAK) arranged factorially including 2 factors which were repeated 3 times. Factor I is the nutrient dose of Azolla liquid organic fertilizer which consists of 3 levels 4 namely D1: 0 ml/1 water, D1: 2 ml/l water, D2: 4 ml/l water, D3: 6ml/l water and Factor II is Time interval for application of 3 level Azolla liquid organic fertilizer. S1: Application time interval 2 days, S2: Application time interval 4 days, S3: Application time interval 6 days. Plant height (cm) was observed at 0, 7, 14, 21, 28, 35 HST, measured using a meter. The number of leaves at 1, 3, 5, 7 and 9 WAP and leaf width at 0, 7, 14, 21, 28, 35 HST were measured using a tape measure. Accumulated fruit weight per plant (grams) The wet fruit weight of Pokcoy plants is determined by weighing all parts of the plant (roots, stems, leaves). Plants were weighed one by one using an analytical balance. Observational data were analyzed using Analysis of Variance (ANOVA) with a level of α = 0.05 and if there were significant differences between treatments then a further test was carried out using the DMRT test (Duncan's Multiple Range Test) at a level of α = 0.05. The results of research that have been carried out have concluded that there is a real interaction between the concentration of Azolla liquid organic fertilizer (D) and the time interval for POC application on the growth and yield of Pak Choy plants. The best treatment combination for plant height variables; number of leaves; leaf area is the D2S2 treatment, namely the combination treatment of azolla POC concentration of 4 ml/L and the POC application time interval of 4 days, while for plant fresh weight the best combination is D2S3, namely the combination treatment of 6 ml Azolla POC concentration and 4 day POC application time interval with weight. fresh plants amounting to 58.17 grams.

The Effect of Organic Chicken Manure Fertilizer on the Yield of Chicory Microgreens

Chicory is one of the interesting plants to cultivate microgreens. Microgreens cultivation began to trend carried out by urban communities in Indonesia during the pandemic, considering the Indonesian government's policy on the Implementation of Community Activity Restrictions. The application of organic fertilizers in microgreens cultivation planting media is important as a supplier of nutrients for the sustainability of plant growth and yield. Organic chicken manure fertilizer has been formulated consisting of chicken manure, kokopit, burnt husks and EM4 activator and fermented for 3 weeks, then tested against the growth and yield of chicory cultivated microgreens. How the effect of chicken manure organic fertilizer on the growth of chicory microgreens is the goal of this experiment. The experiment used a single-factor randomized group design consisting of five treatments and six groups. The treatment is the level of organic fertilizer dose of chicken manure, namely, 0, 125, 250, 375, and 500 g on an area of 27.10-2 M 2,100 plants with a total planting media weight of 2.103g per treatment. The experimental results showed that the level of chicken manure fertilizer 250 g per plot was the best for the variable response of fresh weight of plants, and fresh weight of roots, while the dose of 375 g had the best effect on germination, plant height, and root length.

Physical and Chemical Properties of Limestone Quarry Technosols Used in the Restoration of Mediterranean Habitats

The lack of topsoil is frequently a limiting factor in limestone quarry restoration. This implies that new technosols for maintaining target habitats must be created using mining wastes as the main components. We designed three different technosols using different combinations of mineral materials (mining wastes, excavated soils and topsoil), organic amendment types (compost and digestate) and doses for the restoration of target habitats. Moreover, we monitored the main physicochemical indicators of the quality of the technosols. We observed not only an increase in soil organic carbon and plant nutrients related to the application of any type of organic amendment, but that the digestate mostly increased the soil resistance to erosion by improving soil aggregation even before the emergence of vegetation. Soil-water-retention capacity only improved in technosols built with organic amendments and topsoil. The combination of mining wastes, organic amendments and a superficial horizon of topsoil resulted in the most optimal technosol for the restoration of limestone quarries in the Mediterranean climate.

Influence of different doses of organic fertilizer from poultry fertilizer pellets on melon and cucumber crops

Influence of different doses of organic fertilizer from poultry fertilizer pellets on melon and cucumber crops

Influence Of Fertilization And Mulching Techniques On Yield, Weed Management And Economics Of Elephant Garlic (Allium Ampeloprasum L.)

The experiment comprised four doses of organic and inorganic fertilizers and four different types of mulches viz. no mulch, rice straw mulch, Saccharum spp. mulch, black polyethylene mulch laid out on factorial randomized complete block design replicated thrice. The major challenge in the study was the efficient management of weeds through eco-friendly technologies involving mulches. The studies revealed that high yields in elephant garlic can be achieved by fertilizing it with N:P: K @120:60:60 kg/ha + FYM @ 24 t/ha and mulching it with rice straw. The study pointed out the effectiveness of locally available rice straw as a potential mulch for improving the micro-climate of elephant garlic and thereby enhancing its important horticultural traits. The highest benefit-cost ratio of 1:4.0 was however obtained in treatment having N:P:K @120:60:60 Kg/ha, FYM @24 t/ha in combination with rice straw mulch which resulted in a high net income of ₹ 1139007 with a gross income of ₹ 1423575 at cultivation cost of ₹ 284568. The study will be helpful in checking of weed menace in closed spaced crop of Alliums spp. and will help in increasing the farm income of the growers.

Nitrogen-sparging assisted anoxic biological drinking water treatment system.

Existing heterotrophic denitrification reactors rely on microorganisms to consume dissolved oxygen (DO) and create conditions suitable for denitrification, but this practice leads to excessive microbial growth and increased organic carbon doses. An innovative reactor that uses nitrogen gas sparging through a contactor to strip DO was developed and tested in the lab. It reduced influent nitrate from 15 to <1 mg/L as N with nitrite accumulation <1 mg/L as N. It maintained a consistent flow rate and developed minimal headloss, making it easier to operate than the denitrifying dual-media filter that was operated in parallel. Gravel, polyvinyl chloride pieces, and no packing media were assessed as options for the nitrogen-sparged contactor, and gravel was found to support denitrification at the highest loading rate and was resilient to nitrogen-sparging shutoffs and intermittent operation. This innovative reactor appears promising for small drinking water systems.

Response of mint (Mentha spicata L.) crops to chemical and organic fertilization

With the purpose to define the appropriate doses in the production of mint cultivation, this research was conducted in three locations (Gibraltar, Arboleda and Aguacatal) of the municipality of Jardín, Antioquia. The soils of these localities are andisols, with medium contents of organic matter, low in interchangeable bases, low in phosphorus and boron, with characteristics of low fertility. For this research, Mentha spicata L. (mint) was seeded at a distance of 0.3x0.3 m, in an experimental design of randomized complete blocks with four repetitions, with five increasing doses of compound fertilizer (10-30-10) (0, 60, 120, 180, and 240 kg ha-1), in combination of five increasing doses of organic fertilizer (0, 1.8, 3.6, 5.4, and 7 t ha-1), and one control with a biological fertilizer. In five foliage harvests, the highest dry matter (DM) yields were achieved with the application of 180 and 120 kg ha-1 of 10-30-10, with yields of 156 and 158 g of DM per square meter, respectively.

Effects of the microbial organic fertilizer and plant density on growth, development and yield of roselle (Hibiscus sabdariffa L.) in Central Vietnam

Roselle is a potential crop in Vietnam due to its wide adaptation and many uses. In Thua Thien Hue province – Central Vietnam, the roselle has been grown widely at Phong Dien district. However, local people were growing on their experience and mainly using inorganic fertilizers, which had affected the crop yield partly. In order to towards environmentally friendly and contribute to completing the growing process to expand the safe material area for roselle, the experiments were carried out during 2021 and 2022 to evaluate the effects of microbial organic fertilizer doses and planting density on the growth, development and yield of roselle. The experiment consisted of twelve treatments, with three doses of microbial organic fertilizer (0, 0.5, 1.5 tons/ha) and four planting densities (21000, 24000, 28000, 33000 plants/ha), arranged in a split-plot design with three replications for each treatment. The results showed that in the 0.5 tons/ha of microbial organic fertilizer application treatment and planted at 33000 plants/ha had the highest yield per plant in both crops (568.04 and 590.04 g/plant), with yields of 20.98 and 20.56 tons/ha, respectively. Therefore, it could be recommended to use that amount of microbial organic fertilizer and plant density in the process of growing roselle in Thua Thien Hue and similar ecological regions.

Utilization of Septic Tank Waste to Enhancement the Growth of Spinach in Various Media

Septic tank waste can be used as a new alternative to be used as fertilizer because human excrement contains the availability of nutrients needed by plants. The research aimed to know the effect of liquid organic fertilizers dose, and plant media type of both to increase the growth and the production of plant spinach. The experimental design used was Block Randomized Design factorial with 9 treatments and 3 replicates. The first factor consists of 3 doses of fermented septic tank waste of human feces. Namely doses of 0 mL/plant (K1), 0,4 mL/plant (K2), 0,6 mL/plant (K3). The second factor is the planting medium consisting of 3 kinds of land or control (M0), land + husk charcoal (M1), land + Manure (M2). The observed variables include the number of leaves, plant height, root length, fresh weight of plant, root fresh weight, dry weight, root dry weight of the plant. The results showed that the fermented septic tank waste 0,6 mL (K3) influential real against the number of leaves. Granting planting media differ very markedly against all variable observations i.e. high number of plants, leaves, root length, fresh weight of plant, root fresh weight, dry weight, root dry weight of the plant. All variables are not found the existence of an interaction between fermented septic tank waste with the media.