Growth Of Corn Plants Research Articles

Study of nitrogen status in different planting systems and organic fertilizer doses in sandy soil

This study was conducted to determine the effect of different jajar legowo planting systems in intercropping sweet corn with peanuts, as well as the addition of several doses of organic fertilizer on soil nitrogen status and plant leaf tissue on sandy soil. The research was conducted from January to May 2023, on the south coast of Jember Regency. The study used a split-plot design; the main plot consisted of the treatment of 2:2 (A1) and 4:2 (A2) jajar legowo intercropping systems. The subplots were different doses of cow dung organic fertilizer: 10 t ha-1 (B1), 20 t ha-1 (B2), and 30 t ha-1 (B3), each repeated three times. Observational data were analyzed by ANOVA and DMRT 5%. The results of the study showed that the combination of the planting system and organic fertilizer doses applied had not been able to provide optimal microclimate and soil properties for the growth and development of sweet corn plants. The A2 planting system provides a better microclimate and plant morphology for plant N availability and absorption. The addition of organic fertilizer up to the highest dose (B3) has not been able to maintain optimal soil water and N availability for sweet corn in sandy soil.

Effectiveness of Weed Control on Two Varieties of Corn (Zea Mays L.) in West Aceh Regency

This research aims to find out which weed control techniques are most effective in suppressing weed growth on corn plants, to find out the interaction of manual, mechanical, and chemical weed control on corn plants, to find out the influence of weed control techniques on the production and growth of corn plants. This research be carried out in West Aceh Regency on corn farming land in the Pante Ceureumen District. The time allocation is from April to June 2014. The research was conducted using a randomized block design with a factorial pattern with two factors being studied. The first factor is the weed control technique (T): no control, manual control, using husk charcoal, chemical, atrazine + mesotrion 1.35 ml each 9 m² and the second factor is the variety (V): Bisi-2 and Bisi-18. Based on the treatment of 12 plots with 3 repetitions times until there are 36 experimental units. Each treatment plot measures 300 cm x 300 cm with a planting distance of 75 cm x 25 cm so that the number of sample plants in each plot is 48 plants and the number of sample plants in each plot is 8 plants. The distance between plots is 50 cm and the distance between replications is 100 cm. The results obtained from observations are analyzed using the F test. If the results obtained from the variance are significantly different at the 5% level. The result of the research that has been carried out is that the most effective control technique in suppressing weed growth in corn plants is found at T5 (chemistry, topramezone + atrazine 1.35 ml each 9 m², at 21, 40, and 56 HST), followed by T2 (culture technique using rice husk charcoal), T4 (Chemical, nicosulfuron + atrazine 1.35 ml each 9 m², at 21, 40, and 56 HST) and T1 (manual, at 21, 40, and 56 HST) have the same position, then T3 (chemistry, atrazine + mesotrione 1.35ml each 9 m², at 21, 40 and 56 HST), and the last position in weed control techniques is WC (without control).

Planting Geometry May Be Used to Optimize Plant Density and Yields without Changing Yield Potential per Plant in Sweet Corn.

Planting geometry is one of the most important management practices that determine plant growth and yield of corn. The effects of eight planting geometries (35 × 23 cm, 40 × 21 cm, 45 × 19 cm, 50 × 18 cm, 55 × 17 cm, 60 × 16 cm, 65 × 15 cm, 70 × 15 cm) on plant growth and yields of three sweet corn hybrids (Argos F1, Challenger F1, Khan F1) were investigated under Erzurum, Türkiye conditions in 2022 and 2023 years. Variance analysis of the main factors shows a highly significant effect on whole traits but in two-way interactions some of the traits were significant and in the three-way interactions, it was insignificant. As an average of years, the number of plants per hectare at the harvest varied between 92,307 (35 × 23 cm) and 120,444 (70 × 15 cm) according to the planting geometries. The highest marketable ear number per hectare (107,456), marketable ear yield (24,887 kg ha-1), and fresh kernel yield (19,493 kg ha-1) were obtained from the 40 × 21 cm planting geometry. The results showed that the variety Khan F1 grown at 40 × 21 cm planting geometry obtained the highest marketable ear number (112,472), marketable ear yield (29,788 kg ha-1), and fresh kernel yield (22,432 kg ha-1). The plant density was positively correlated with marketable ear number (r = 0.904 **), marketable ear yield (r = 0.853 **), and fresh kernel yield (r = 0.801 **). The differences among the varieties were significant for the studied traits, except for plant density and kernel number per ear. In conclusion, the variety Khan F1 should be grown at the 40 × 21 cm planting geometry to maximize yields under study area conditions without water and nutrient limitations.

RESPON PERTUMBUHAN DAN PRODUKSI TANAMAN JAGUNG PULUT TERHADAP PERLAKUAN PRUNING TONGKOL KEDUA DAN PENYEMPROTAN PUPUK PELENGKAP CAIR

This study was conducted to determine the response of corn plants to the second cob pruning treatment and liquid complementary fertilizer (LCF) spraying on the Growth and Production of Waxy Corn Plants (Zea mays ceratina L.). This study was conducted at the Experimental Garden of Pabentengan Bajeng Village, Gowa Regency, South Sulawesi, from September to December 2018. The materials used in this study were local waxy corn seeds, liquid complementary fertilizer (Bram Evolution) urea and NPK fertilizer. The Split Plot Design method was used. The main plot is without pruning and with pruning, while the sub-plot is Spraying Liquid Complementary Fertilizer (LCF) consisting of 4 levels, namely without LCF spraying, spraying with a concentration of 10 mL/L water, 20 mL/L water, and 30 mL/L water, 8 treatment combinations repeated 3 times to obtain 24 experimental units. The results of this study indicate that pruning the second cob increases the dry weight of the plant, seed weight per plant, seed weight per plot, and seed weight per hectare. LCF spraying and the interaction between pruning and LCF spraying treatments did not affect the observed parameters

The Effect of NASA Liquid Organic Fertilizer and Chicken Manure on the Growth of Sweet Corn Plants (Zea mays saccharata Sturt)

This research aims to determine the effect of a combination of NASA POC and chicken manure on the growth and production of sweet corn (Zea mays saccharata Sturt). The research used a Randomized Group Design (RAK) with two treatment factors. The first factor is the administration of NASA Liquid Organic Fertilizer (A) consisting of 4 treatment levels, namely: A0 = 0 ml/liter of water (control), A1 = 2 ml/liter of water, A2 = 4 ml/liter of water and A3 = 6 ml /liter of water. The second factor is the provision of chicken manure (B) consisting of 3 treatment levels, namely: B1 = 2.25 kg/plot (7.5 tons/ha), B2 = 4.50 kg/plot (15 tons/ha) and B3 = 6.75 kg/plot (22.5 tons/ha). The results showed that giving NASA POC up to 6 ml/l of water significantly increased plant height, ear length, ear weight per plot and total dissolved solids. Providing chicken manure up to 6.75 kg/plot significantly increased plant height, ear length, weight per plot and total soluble solids. The interaction between NASA POC and chicken manure did not significantly affect plant height, ear length, weight per plot, or total dissolved solids.

Determination of The Critical Period of Sweet Corn Plants (Zea Mays Saccharata Sturt) Against Weed

The critical period is a time when cultivated plants are very sensitive to the presence of weeds so that the disturbance caused by them can reduce the final yield. So, no the entire growing period of plants is affected by weeds. This critical period relates to the time of proper control so that the presence of weeds does not always require control measures. This research aims to determine the critical period for sweet corn (Zea Mays Saccharata Surt) against weeds and the effect of weeds on the growth and yield of sweet corn plants. This research was carried out at Gampong Mesjid, Kaway XVI, West Aceh Regency, Soil Science Laboratory and Pest and Disease Laboratory, Agroecotechnology Study Program, Faculty of Agriculture, Malikussaleh University, North Aceh from February to April 2024. This research used an experimental method of randomized block design (RAK), the single factor that consists of 10 treatments with 3 repetitions. P1: 0-15 DAP with weeds, P2: 0-30 DAP with weeds, P3: 0-45 DAP with weeds, P4: 0-60 DAP with weeds, P5: 0-Weedy harvest, P6: 0-15 DAP weeds free, P7: 0-30 DAP weeds free, P8: 0-45 DAP weeds free, P9: 0-60 DAP weeds free, P10: 0-DAP harvest free from weeds. The observation data were analyzed using analysis of variance, the treatment average was obtained through Duncan’s Multiple Range Test (DRMT) a the 0.05 level. The research results show that the critical period for sweet corn (Zea mays saccharata Sturt) for weeds is determined at the age of 16-30 days after planting. Weed control carried out between 16-30 days of plant age will not inhibit the growth and yield of sweet corn plants.

PENGARUH BERBAGAI JENIS DAN DOSIS PUPUK NPK TERHADAP PERTUMBUHAN DAN PRODUKSI JAGUNG MANIS (Zea mays saccharata STURT L.)

This study aims to determine the effect of different types of NPK fertiliser on the growth and production of sweet corn plants. The research was conducted from mid-March to June 2021 on dryland, Cendana Hijau Village, Wotu Sub-district, East Luwu Regency, South Sulawesi. The research used the method of group randomised design (RAK) factorial pattern of 2 factors consisting of the first factor is the type of NPK fertiliser consisting of 2 treatment levels and the second factor is the dose of fertiliser consisting of 4 treatment levels. The results showed that in general the use of NPK Phonksa fertiliser was better than the use of NPK Pelangi fertiliser.

Respon Pertumbuhan Dan Produksi Tanaman Jagung Manis (Zea Mays Saccharata Sturt) terhadap Pemberian Pupuk Kandang Sapi Di Kabupaten Merauke

This research aims to analyze the response of cow manure to the growth and production of sweet corn plants. This research was conducted in May-July 2023 in Marga Mulya Village, Semangga District, Merauke Regency. This research used a randomized block design (RAK) consisting of treatments P0 (without fertilizer), P1 (fertilizer dose 20 tons/ha), P2 (fertilizer dose 25 tons/ha), P3 (fertilizer dose 30 tons/ha), and five repetitions to obtain 20 experimental units. The research results for the growth component treatment showed that plant height gave the highest results in treatment P3 (138 cm), leaf length in treatment P0 (121 cm), and leaf width in treatment P2 (8.14 cm). Meanwhile, the highest number of leaves was in the P2 treatment with (8.56 pieces), the longest cob length in the P2 treatment (19.56 cm), the highest number of rows/cobs in the P1 treatment (15.86 rows), the cob/sample weight in the P2 treatment with (204.04 g), the highest total weight/plot was in treatment P2 (1.48 kg). Providing cow manure has little effect on the growth and production of sweet corn plants in Merauke Regency.

Effect of Bacterial Consortium and Rice Husk Charcoal to Control Downy Mildew in Corn (Zea mays L.)

Background: The purpose of applying bacterial consortium and rice husk charcoal to corn plants is to determine the effect of the combination and whether it can control the intensity of downy mildew attacks and increase corn plant growth. Methods: This research was conducted at the experimental farm of the University of Muhammadiyah Malang. This research was conducted using two factors: the dose of rice husk charcoal application and the application of bacterial consortium with three replications using a randomized block design. The treatments were Charcoal husk (H): H5 = Charcoal husk @5 tons/ha, H10= Charcoal husk @10 tons, H15 Charcoal husk @15 tons/ha, Bacterial consortium (W): W0= without bacteria, WL = bacterial consortium 10 cc/l via foliar spraying, WS = bacterial consortium 10cc/l through soil, WLS = bacterial consortium 10cc/l through soil and foliar spraying Result: The results showed that the intensity of downy mildew attack on the combined application of the bacterial consortium and rice husk charcoal was lower than that of the no-combination treatment. The length and diameter of the plants that were treated with rice husk charcoal had a significant effect. Still, the application of the bacterial consortium had no effectand the number of leaves was not affected by the treatment.

PENGARUH PENGGUNAAN PUPUK KOMPOS DARI SERBUK KAYU TERHADAP PERTUMBUHAN TANAMAN JAGUNG

This research aims to determine the effect of using compost from wood dust on the growth of corn plants (Zea Mays L). This type of research is quantitative research with pure experimental methods (true experiments). The population of this study was corn plants (Zea Mays L.) in 30 polybags. This research sample used simple random sampling consisting of 30 polybags of corn plants (Zea Mays L.) with six treatments and five replications. The treatments applied were P0 (without fertilizer), P1 (5 kg), P2 (4 kg), P3 (3 kg), P4 (2 kg), P5 (1kg). This research data was analyzed using the SPSS application version 20. Based on the analysis using the one way anova test, it showed that the application of wood compost powder to the P5 treatment (5 kg) on ​​corn plants had a very real influence on stem height, number of leaves and stem diameter of corn plants. . . The results of data analysis from the Tukey HSD Least Significant Difference (BNT) test also show that the Fcount > Ftable value means Ho is rejected and Ha is accepted. This is because the more compost dose given, the more N contained in the bokashi will be received by the soil. Based on the research results, it shows that the use of sawdust compost has a real influence on the growth of corn plants (Zea Mays L.). The advice offered by researchers is that the use of compost should be increased to overcome the scarcity and high cost of inorganic fertilizers.

Sodium nitroprusside, a donor of nitric oxide, enhances arbuscular mycorrhizal fungi symbiosis with corn plant and mitigates Cd bioavailability in the rhizosphere

Arbuscular mycorrhizal fungi (AMF) have been demonstrated to influence the bioavailability of heavy metals (HM) in the rhizosphere and their absorption by plants. Nitric oxide (NO) has been shown to increase plant tolerance to environmental stresses and promote the plant-fungal symbiotic relationship. However, to date, no research has been conducted to investigate the impact of utilizing living organisms with specific molecules that are effective in promoting plant growth in conjunction with the chemical alterations of HM in the rhizosphere. Therefore, this study was conducted as a completely randomized factorial design using the rhizobox technique to investigate whether the use of Funneliformis mosseae fungi and sodium nitroprusside (SNP, 100 mM) as a donor of NO, alone or in combination, can improve corn plant growth and affect the Cd fractions in the rhizosphere of Cd-contaminated soil. The results show that the inoculation of AMF and the application of SNP, either alone or in combination, significantly increased plant growth. This was achieved by reducing the bioavailable form of Cd in the rhizosphere, which in turn led to a decrease in the concentration of Cd in corn plant tissues. The inoculation of AMF, either alone or in combination with SNP, resulted in a decrease in the concentration of Cd in its exchangeable (EXCH), carbonate-bound (CAR), and Fe–Mn oxides-bound (MnOX and FeOX) forms, and an increase in its organic matter-bound (ORG) and residual (RES) forms in the rhizosphere. The study found that the rhizosphere had lower concentration of bioavailable form of Cd (EXCH-Cd (43%), CAR-Cd (9%), MnOX-CD (18%), FeOX-Cd (33%) and ORG-Cd (30%)) and higher concentration of low-toxic form of Cd (RES-Cd (56%)). This indicates the role of root exudates in the redistribution of Cd fractions in soil. The study also revealed that AMF colonization, in combination with SNP, affected the biogeochemical fractions of Cd and reduced Cd mobility in the rhizosphere. This improvement in Cd mobility led to reduced Cd accumulation in the plant tissues, resulting in improved corn plant growth.

Bacillus aryabhattai dose recommendation for corn seed inoculation

The use of plant growth-promoting bacteria (PGPB) can be a sustainable alternative to improve the uniformity and speed of emergence and initial growth of plants. However, the effects of Bacillus aryabhattai inoculation are still incipient and inconclusive, and there is no recommendation for the use of inoculant doses containing B. aryabhattai. This study was conducted to investigate the effectiveness of B. aryabhattai inoculation in improving the germination and initial growth of corn plants (Zea mays L.), and to determine the optimal inoculant dose to be recommended for inoculation of corn seeds. Corn seeds were inoculated with 0, 10, 20, 30 and 40-mL kg–1 of the inoculant containing the strain CMAA 1363 of Bacillus aryabhattai. Four replicates of 50 seeds were sown in plastic boxes containing washed coarse sand. At 18 days after sowing, the emergence rate (E), shoot length (SL), root length (RL), shoot dry matter (SDM) and root dry matter (RDM) was recorded. The results showed that the use of inoculant containing B. aryabhattai improved the initial growth and dry matter production of corn plants. This suggests that B. aryabhattai could be an excellent option for producing microbiological inoculants with enormous potential for use in Brazilian and global agriculture. The optimal dose of inoculant containing B. aryabhattai to be applied to corn seeds can range between 20 and 22-mL kg–1 of inoculant.

PENGARUH WAKTU PENYIANGAN TERHADAP PERTUMBUHAN DAN HASIL TANAMAN JAGUNG HIBRIDA (Zea mays L) VARIETAS N 37

This research was carried out at UPTB BP3K Sungai Lilin, Tanah Sepenggal Lintas District, Bungo Regency. This research was carried out from March 25 2014 to June 25 2014. The aim of this research was to determine the effect of weeding time and to determine the right weeding time for the growth and yield of corn plants. The design used in this research was a Randomized Group Design (RAK) with 5 treatments and 4 replications, the treatments were as follows: P0 (No weeding), P1 (weeding at 14 days after planting), P2 (weeding at 21 days after planting), P3 (weeding at 28 days after planting) and P4 (weeding at 35 days after planting). The variables observed were plant height (cm), total leaf area (cm2), age at start of flowering (DAT), net cob weight (g) and dry shelled corn yield (tons/ha). The results of the research show that different weeding times have a real influence on plant height (cm), total leaf area (cm2), age when flowering starts (DAP), net cob weight (g), but have no real effect on dry shelled corn yield ( tons/ha) in corn plants. Overall, weeding time at 14 days after planting has the best effect on the growth and yield of corn plants.

Correlation of Soil Chemical, Biological, and Physical Characteristics on Productivity of Maize in Cibugel District, Sumedang Regency

Maize as one of the national food commodities, experiences an increase in demand every year. Both internal and external factors influenced the growth of corn plants. Internal factors originated from the plant, such as inherited genetic traits, while external factors came from the environment, including soil properties and climate. External factors that affected plant growth included biological, physical, and chemical soil characteristics. This research aimed to understand the interrelation between soil acidity (pH), phosphorus availability (P), cation exchange capacity (CEC), nitrogen-fixing bacteria, earthworm population, carbon-nitrogen ratio (C/N), and soil texture on the productivity of maize in Cibugel District and how these factors were interconnected to support plant growth. The research employed a descriptive survey and comparative method, with soil samples taken from 18 soil samples from six villages in the Cibugel Subdistrict, Sumedang Regency. The correlation analysis results showed a significant positive relationship between cation exchange capacity and corn productivity and a significant negative relationship between available phosphorus and corn productivity. This implied that increasing cation exchange capacity could enhance productivity while increasing available phosphorus could decrease productivity. The research aided in identifying soil characteristics influencing high land productivity in the area.

Down-streaming Small-Scale Green Ammonia to Nitrogen-Phosphorus Fertilizer Tablets for Rural Communities

This study aims to evaluate the growth and production of sweet corn plants in response to the application of commercial NPK fertilizer and various doses of nitrogen-phosphorus fertilizer tablets. From early October 2022 to late January 2023, research was conducted at Research and Development Luas Birus Utama to produce nitrogen-phosphorus fertilizer tablets and at Research and Development Syngenta Indonesia Cikampek Station, Karawang, to perform a semi-field analysis. A factorial randomized block design with two treatment factors was employed in this study. The first factor was five types of nitrogen-phosphorus fertilizer tablets, namely, A (0% nitrogen and 6.3% phosphorus), B (0.81% nitrogen and 6.3% phosphorus), C (1.57% nitrogen and 6.1% phosphorus), D (2.33% nitrogen and 6.2% phosphorus), and E (3.06% nitrogen and 6.2% phosphorus). The second factor was F (standard nitrogen, phosphorus, and potassium). The results revealed that applying different dosages of nitrogen-phosphorus fertilizer tablets in combination with potassium chloride fertilizer yielded no different effect on the growth, biomass, and yield components of sweet corn plants when compared to applying NPK fertilizer. A comparison between the soil test results before and after application revealed that the formulation of fertilizers in tablet form helps plants to effectively absorb the required nutrients. It is currently possible to develop small-scale or microscale green ammonia production technology to fulfill the fertilizer requirements of rural communities because of its low cost, low carbon emissions, and low renewable energy consumption. The scarcity of fertilizer supplies endangers Indonesia’s food sustainability. Nitrogen-phosphorus fertilizer tablet production technology can be used in areas with a scarcity of inorganic fertilizers but with the potential for low-grade phosphate mines using commercial ammonia solutions. Thus, understanding how to produce nitrogen-phosphorus fertilizer tablets from ammonia solution will aid in the acceptance of microscale green ammonia production technology. Doi: 10.28991/ESJ-2024-08-02-016 Full Text: PDF

Distribution of Levels of Suitability of Land Characteristics and Growing Degree Days (GDD) for Corn (Zea mays L.) in West Sumatra

The decline in corn production is influenced by several factors, one of which is the suitability of land characteristics. This research analyses land characteristics' suitability and GDD for West Sumatra Province corn crops. The suitability of land characteristics is studied by combining the suitability of land characteristics with the GDD value in the area. The suitability of land characteristics is determined by matching plant growth requirements and land characteristics. The parameters used to determine the suitability of land characteristics are land use, slope, soil pH, soil texture and rainfall. GDD suitability by matching the accumulated daily temperature data during one growing season to the optimal GDD value for corn plant growth. This research created 12 planting time scenarios, and the analysis was carried out based on Regency/city administrative areas in the West Sumatra region. The analysis results obtained a suitable land area based on land characteristics and GDD values, namely an area of 1,206,079.48 ha with a planting season of December-March. Areas in West Sumatra Province with great potential for corn crop development are Lima Puluh Kota Regency, Pasaman Regency, Sijunjung Regency, South Solok Regency, and Tanah Datar Regency.

AB mix-NPK fertilizer combination effect on corn plants growth using Nutrient Film Technique

Corn (Zea mays) is one of the important food crops in Indonesia. Efforts to increase corn production continue to be made, one of which is by using appropriate fertilizer. The aim of this research is to determine the effect of the combination of AB Mix and NPK fertilizers on the growth of corn (Zea mays) plants using the NFT hydroponic system. This study used qualitative research methods. The data collection technique in this research is literature study, while data analysis is carried out in three stages, namely data reduction, data presentation and drawing conclusions. The findings from the research show that the use of a combination of AB mix and NPK fertilizers in the growth of corn (Zea mays) using the Nutrient Film Technique (NFT) technique has a significant impact. Using these two types of fertilizer together increases the growth of corn plants by increasing plant height, number of leaves, and development of the root system. In addition, with optimal nutrient availability from the fertilizer combination through the NFT technique, corn production is increased efficiently. The findings show the potential for using a combination of AB mix and NPK fertilizers in increasing agricultural yields.

The Effect of Application Compost and Biochar from Salak Leaf Sheaths on Carbon Status and Growth of Corn Plants (Zea mays L.) in Ultisol Soil

. Penelitian ini bertujuan untuk mengetahui perbedaan dan dosis terbaik aplikasi pelepah daun salak dalam bentuk kompos maupun biochar pada status karbon serta pertumbuhan tanaman jagung (Zea mays L.) di tanah Ultisol. Penelitian ini dilaksanakan di Rumah Kaca Fakultas Pertanian Universitas Sumatera Utara, dimulai pada bulan Juni 2022 sampai Januari 2023. Rancangan yang digunakan pada penelitian ini adalah Rancangan Acak Kelompok Non Faktorial yang terdiri dari 4 ulangan dengan tingkat dosis bahan kompos pelepah daun salak dan biochar pelepah daun salak (20, 40 dan 60 ton/ha). Hasil penelitian menunjukkan bahwa aplikasi kompos dan biochar pelepah daun salak nyata meningkatkan status karbon pada masa inkubasi 20 hari serta pertumbuhan tanaman jagung di tanah Ultisol. Pelepah daun salak dalam bentuk kompos lebih baik dalam meningkatkan bahan organik dan pertumbuhan tanaman jagung, sedangkan pH H2O lebih baik pada pengaplikasian pelepah daun salak dalam bentuk biochar. Aplikasi pelepah daun salak dalam bentuk kompos dan biochar terbaik dalam meningkatkan status karbon serta pertumbuhan tanaman jagung terdapat pada dosis 60 ton/ha.

Expert System for Diagnosing Corn Plant Diseases Using the Web-Based Certainty Factor Method

In the process of corn plant growth, it often faces the threat of various diseases that can hinder optimal growth. Dealing with this issue often requires the presence of a plant expert, such as a field agricultural extension officer. However, limitations in the human resources of agricultural extension officers, time constraints, and geographical distances often make it difficult for farmers to get direct assistance from experts. To overcome these constraints, a system capable of addressing issues related to corn plant diseases, similar to the role of an expert, is needed. In this study, the Certainty Factor method is employed, suitable for an expert system that measures the level of uncertainty, and through testing with 28 sample data cases, the accuracy level of this system reaches 90%.

Aplikasi Formulasi Kapur, Bahan Organik dan Pupuk NPK terhadap Kadar Aluminium dan Besi serta Pertumbuhan Jagung di Lahan Pasca-Tambang Batubara

The level of solubility of aluminum and iron metals in the soil is one of the post-coal mining land problems. The high solubility of Al and Fe can be toxic to plants, so that plants are difficult to grow. This study aims to reduce the solubility of Al and Fe using formulations of liming, organic matter, and NPK fertilizer and to examine their effects on the growth and height of corn in post-coal mining land. The study used a Completely Randomized Design (CRD) with a single factor of ameliorant formulation. The treatment consisted of 10 treatments and was repeated three times, so there were 30 experimental units. The results showed that the application of ameliorant formulation of liming, organic matter, and NPK fertilizer had an effect on decreasing the solubility of Al and Fe in the soil and increasing the growth of corn in post-coal mining land. Soil that has been applied with K1 treatment (lime 3 t ha-1) can give the best results in reducing the solubility of Al and Fe metals in the soil. Application K2 treatment (giving organic matter 10 t ha-1), gave the best results for increasing the growth of corn in post-coal mining land. The best treatment for reducing Al and Fe soluble and increasing plant height growth was found in the treatment of lime 3 t ha-1 + organic matter 10 t ha-1 + NPK fertilizer 50 kg t ha-1, which was 0.42 (me 100g soil-1), 4.48 (ppm) and 108 (cm). The conclusion of this research is that the application of lime formulations, organic materials and NPK fertilizer is able to reduce levels of Al-dd, soluble Fe in the soil and increase the height growth of corn plants. Dolomite is able to reduce Al-dd and Fe-soluble levels. The application of organic and inorganic fertilizers affects the growth of corn height.